Exact matches only
Search in title
Search in content
Search in excerpt
Search in comments
Filter by Custom Post Type
Tested Products 4
Hours Spent 56
Evaluated Studies 11
Considered Reviews 761

Best Fish Finder 2020 • 4 Fish Finders Reviews

Using a fish finder to find fish can help make fishing fun. With a fish detector on your boat, you can stop going aimlessly around a water body while you try to find fish. Instead, you can simply monitor the fish finder while you're boating, and then throw your line into the water when you encounter fish.

Fish Finder Leaderboard 2020

Last update:

Show similar comparisons

What is a fish finder?

A fish finder should help an angler to find good fishing locations. The device cannot do all the work. Because otherwise, as the name suggests, the fish finder does not actually find fish.

It only gives information about the conditions of the water, for example, the water depth, the condition of the soil and overlying irregularities. Ultimately, however, it is always up to the user to interpret this information correctly.

How does a fish finder work?

NorCross HawkEye F33P Fish FinderThe fish finder uses the technology of the echo sounder. This was originally invented during World War II to find enemy submarines. The device emits ultrasonic waves that travel through the water at more than one kilometer per second.

Whenever they encounter something harder than water, they are reflected and received by a transmitter on the echo sounder again. Based on the time required for the individual waves, the distance can then be determined very accurately. In this way, anglers always know how deep the water is below them. In addition, however, other irregularities can be determined.

The fish finder prepares the information in a graphic that is usually displayed on the integrated display. However, this does not show beyond any doubt exactly where fish are, but only approximate values based on the detected irregularities. Larger accumulations of dense objects above the seabed can be an indication of a school of fish, for example.

Advantages & Applications

A fish finder is in principle useful for every angler but also performs well in normal shipping. Almost every ship today is equipped with a depth sounder to permanently measure the water depth. This ensures that no one runs aground unintentionally. Anglers, of course, want to find interesting places to fish in the first place.

Those who can correctly assess the information of their fish finder have a powerful tool in their hands. Although the device cannot tell exactly where fish are, what species it is and how tall individual specimens are. But depending on the model, it reliably finds so-called hot spots, ie places where larger amounts of fish are present than at other locations in a lake or in the sea.

By the way, today's devices from the Fishfinder Reviews 2020 are convincing due to their very simple operation. They do not necessarily hang in the water, but can also be operated from the boat without further notice. The important thing is to filter out your own boat and the surrounding air from the results. Some fish finders do this automatically, but for some other models, the user has to assess the results himself.

By the way, fish finders are not only interesting for anglers, but also for divers. They can use the practical devices to determine how deep a body of water is and whether there are any obstacles or even dangers in the dive.

What types of fish finders are there?

Fishfinder is available as both mobile and stationary solutions. Mobile fish finders are easy to take with you anywhere, so they're ready for use without complicated installation. This benefits everyone who travels on several different boats. It does not have to be installed on every boat a fish finder, but it is enough a mobile device.

Of course, this is also useful for those who do not have their own boat and therefore can not install a stationary fish finder. The biggest disadvantage of the mobile fish finder is the lower precision. Since they do not operate directly in the water, the emitted sound waves are already disturbed by the air and the boat. The results are still helpful, but not as accurate as stationary sonar.

Fishers attached to the boat usually achieve significantly better results. This is also because they usually have a higher performance. They can transmit with up to 4,000 watts, whereas mobile echo sounders seldom come up with more than 2,400 watts. The stronger the signal, the lower a sonar can deliver reliable values. Only with stationary solutions measurements up to 1,000 meters or even more are possible. So if you like to fish in deeper waters, the installation of an appropriately equipped fish finder barely gets around.

There are also differences between individual fish finders in the frequency with which sound waves are emitted. More is not always better here. While high-frequency waves provide more detail, low frequencies reach deeper regions in the water. For shallow water, a frequency of 200 kHz is therefore useful, but in deeper waters deliver devices with 50 kHz significantly better results.

Another useful solution for all-around equipment is the so-called dual beam. It uses two different frequencies simultaneously, allowing users to enjoy the benefits of both high detail and long range.

Many modern fishfinders also use GPS for even better location-based measurements. In this way, for example, distances can be measured very accurately, but also the level of a water body and some other details. But with GPS, users can also document their measurements and record them on a map. This has the advantage that no measurement must occur twice in the same place.

This is how the fish finders were reviewed

Lowrance 000-12635-001 Hook-3X Sonar, W 83200 XDCRIn order to easily find the right fish finder for your personal needs, a fish finder review took many different points of view into consideration. Because of course there is not the one fish finder that is equally recommended for everyone. Much more depends on what the device is to be used for. Depending on the preferences of an angler some categories are more important and some less important. All fish finders in the 2020 review had to prove themselves in the following review categories:

Depth measurement

In this category, it was reviewed how deep a fish finder can actually measure and to what depth the results are still useful. In doing so, review persons pay particular attention to whether a certain model can also fulfill the promises of the manufacturers. Because if a fish finder is advertised with a measuring depth of 900 meters, he should also reach this depth easily and deliver useful results. If a device fails in this category, it is hardly interesting for a purchase, because it is one of the most important points in every fish finder.


The angle is a fish finder is an important corner, because it determines also the scope of a measurement. For example, a single measurement with only one frequency provides a fairly accurate image but captures only a relatively small point of the water. With Dual Beam you can reach even higher angles and it can cover a range of about 60 °, which corresponds to about three times a common single beam. However, the best results are provided by the so-called SideImaging, which can cover areas of up to 86 °.

However, you do not have to worry too much about the technical details in this review category. In the fish finder review, review persons analyze exactly which area a certain model actually catches and how well the results of the measurements are.

Workmanship and stability

Since fish finders are always used outdoors, they are exposed to high loads. Therefore, in this review category, it was reviewed whether the material easily withstands sweet and salt water and whether it survives even one or the other fall or extreme weather conditions. In the best case, a user should not have to worry about the condition of his echo sounder and still be able to use it in any situation.

Measurement accuracy

fish finder measurement accuracyEven the best fish finder does not help much if the gauges do not provide accurate results. Therefore, a fish finder review was used to review how reliable the measurement results of the individual devices are. High-quality fish finder review winners must be able to distinguish between fresh and salt water for always good results. In the latter, there is a much greater resistance from floating plankton and other factors, so the sound waves travel longer.

If an echo sounder does not take this into account, the result will be incorrect, which in the worst case could mislead the user.


During the presentation, the form in which the measurements of a fish finder are processed is checked. This is especially interesting for beginners who themselves do not have enough experience to interpret the results themselves. A good fish finder delivers as many self-explanatory images as possible and displays them cleanly and clearly. In this regard, sometimes less is more. If a fish finder is able to hide unimportant information on its own, that's definitely a plus. Also important in this respect is the display used. Only high-resolution and high-contrast LCDs with sufficient illumination can be easily read even in bright sunshine.


When it comes to reliability, everyone expects a fish finder to work well over extended periods of time and deliver flawless results. A wear of individual components should not take place too fast since this is almost a sure indication of inferior materials. Review persons simulate enormous demands for these reviews and, based on the values determined, can determine whether a particular echo sounder is also suitable for use over several years.


With every fish finder review, the price always plays an important role. Cheap devices do not have all the features imaginable, but may still be suitable for some users if they are of high quality and provide good results.

High-priced devices, on the other hand, can afford much fewer errors and should have many useful features. Check review subjects at this point very precisely whether a particular device is worth the price, or whether the manufacturer asking too much.

What should I look for when buying a fish finder?

buying a best fish finderAnyone planning the purchase of a fish finder should keep their own claims in mind. The purchase of a fish finder for deep waters is not very useful if you only want to fish in a local lake with shallow waters anyway. In addition, especially beginners should not necessarily spend the same amount of money. Who has not yet determined whether the hobby fishing actually appeals to him in the long term, can first grow a cheap model without a guilty conscience?

In general, quality also plays an important role in the purchase. No matter whether cheap or expensive, every fish finder should have high-quality materials. This is the only way to ensure that the results are usable and that the device can withstand some loads. Last but not least, you should pay attention to the scope of delivery. In the best case, everything is there that is necessary for the operation and installation of the fish finder.

Especially for stationary models, it is helpful if all materials are already supplied for mounting. This will save you annoying additional purchases of tools.

Brief information on leading manufacturers

There are many different fish finder manufacturers and even no-name products are not always bad. To get a first impression, we have taken a closer look at the four largest and best-known manufacturers.

  • Signstek
  • Lowrance
  • Deeper
  • Garmin
Signstek is a manufacturer that does not specialize in fishing equipment but offers a wide range of electronics products. The product range includes headphones, humidifiers, speakers and much more.

All devices are immediately noticeable by their low prices, which also applies to the fish finder. Nevertheless, the devices usually have a high quality and are technically perfect.

However, they are clearly aimed at newcomers and users with no excessive demands. The operation succeeds without an appreciable prior knowledge and the results are processed perfectly. However, the Fishfinder from Signstek cannot compete with the range or precision of professional equipment.

Lowrance has been producing equipment for anglers for over 50 years. The American company is considered to be the inventor of the fish finder and in the past has largely contributed to innovations and technological developments to the evolution of echo sounders for home users.

It is the world leader in marine electronics, which claims to sell more than one million units a year. In the Lowtech range, there are several fish finders to discover that appeal to both beginners and experts alike.

Some of the echo sounders are amongst the best on the market. But in some cases prices beyond 1,000 euros are due. In principle, however, that all fish finders of Lowrance can convince in their respective field of application. Who decides for this manufacturer, so cannot do much wrong.

The sonar of Deeper is a small feature on the market. Because it is not attached to a boat or held in the hand, but simply ejected with the fishing rod. The collected information then passes the device wirelessly to a smartphone or tablet.

A big advantage of the concept is the ability to update. The manufacturer regularly provides new software that allows even more accurate measurements or adds new features. With a comparably low entry price, Deeper is aimed specifically at technology-conscious hobby anglers who can consciously do without the precision and depth measurement of professional equipment. Qualitatively, Deeper also convinces and delivers perfect products with good workmanship.

The company Garmin has become famous for its miniaturization of GPS receivers. Only then did it become possible to use navigation devices as we know them today in a car or a smartphone. Garmin is still one of the most important manufacturers of hardware and software for navigation and also conquered other business areas.

For example, Garmin devices are also widely used in geocaching. For several years, various fish finders are also part of the assortment, which, of course, also make use of GPS. Anglers can determine their measurements locally and use the values for future excursions.

There are both affordable entry-level models as well as higher-priced professional versions to choose from, so that in principle for each claim finds something suitable.

Internet vs. Specialists: where do I buy my fish finder the best?

Once you've decided to buy a fish finder, you're wondering where to buy it. The internet is a great place to go. There are many different shops here that have a wide assortment. Nearly all current models can be ordered quickly and conveniently in this way and you do not even have to leave the house for it.

Another big advantage is the comparatively low prices. Thanks to the strong competition, the providers regularly underbid each other and customers benefit from unbeatable offers. By the way, you do not have to worry about a return if you do not like it or if you have defective goods. Even when you buy on the Internet you can enjoy the full statutory warranty.

In addition, you even have the right to return a fish finder within 14 days and get the full sale price refunded. Only the postage buyers have to take over at some shops then.

Buying a fish finder in retail is difficult for several reasons. For one thing, it's difficult to even find a store that runs the equipment. Most electricians do without it, so rather a shop, especially for fishing, needs to be visited.

But even if one is found, it offers only a fraction of the Internet's choice. Not infrequently, there are only one or two devices that have already been replaced by successors and prices cannot compete with the Internet in the rule. Because of the numerous advantages, it is therefore highly recommended to buy a fish finder on the Internet.

Worth knowing & advice, The story of the fish finder

History of fish finderThe story of the fish finder begins with the history of the echo sounder. As early as during the First World War, several states were simultaneously researching independently of each other. In Germany, Alexander Behm was the first to succeed. In the years 1916 and 1920, he applied for two patents and finally founded his own company for the economic exploitation of his findings.

In the following years, the technology was used almost exclusively in the military field. The research was concerned with refining the principle to detect hostile submarines safely. After the end of the Second World War, however, the military importance of the echo sounder moved into the background.

Instead, more and more businesses now use the devices to make shipping safer. Even fisheries discovered the benefits of echo sounders at this time for themselves.

Fishfinders for private users did not see the light of day until the end of the fifties. At that time, Lowrance founder Lowrance's Carl Lowrance and his sons recognized the benefits of echo sounders in fishing. On their excursions, they discovered that most areas of any body of water are completely free of fish.

The devices cost about $ 2,000. Adjusted for inflation, this equates to almost $ 17,000 today. That was far too expensive for most anglers. Lowrance and his sons, however, managed to offer a fully functional device for only $ 150. That was the birth of the first commercial fish finder.

Today hardly any anglers abandon the practical devices and thanks to the great success new technical developments have found their way into modern fish finders. The prices were always cheaper, as many companies are constantly in competition.

Numbers, data, facts about the fish finder

Furuno FCV628 Color LCD, 600W, 50200 KHz Operating Frequency Fish FinderThe fish finder has become practically the standard accessory for every angler today. This is mainly due to the downsizing of the devices. Echo sounders in the fifties were as big as a cabinet and weighed several kilograms, so today's technology is available in handy devices weighing in particular under 100 grams.

Thanks to smartphones, the devices can now also be placed anywhere, because the data can be transmitted simply wirelessly and the angler always keeps track without having to hold the fish finder in his hand.

Unfortunately, there are no reliable figures on the sales or distribution of fish finders. But only the historical development gives a good impression of it. For example, Lowrance, a family-owned company, employs more than 1,000 people around the globe today.

The technical development of fish finders goes hand in hand with the public availability of GPS. Since the US make their navigation satellites available to the public, this is the use of echo sounder manufacturers. The technique helps in some cases to locate exactly and can also tell anglers where they have already searched and which places they previously neglected.

It is therefore hardly surprising that navigation companies such as Garmin have discovered the market of fish finders for themselves. Conversely, also developed Lowrance, which were actually known for their fish finder, from the 1990s, numerous GPS devices.

Modern fish finders for private use usually send with frequencies from 50 to 200 kHz, but there are also some exceptions. The devices are interesting for water depths of up to 1,000 meters, which should be more than enough for any small and larger lake. Only on the open sea, the fish finder sometimes reaches their limits. However, only real experts fish here anyway, as the requirements are far higher than in other waters, even off-site. Overall, the fish finder but make both beginners and professionals fishing much easier.

The Echo Sounder Explains

The echo sounder explainsThe functionality and structure of a sonar are relatively simple. Each device initially has a so-called encoder. It is a construction of a conductive crystal and a matching housing. This device is capable of producing and transmitting ultrasonic waves. The sound waves spread in the water and bounce back from anything that gets in their way. At the same time, the encoder serves as a kind of microphone.

The duration until the sound waves return indicates how far an obstacle has been removed. The intensity betrays again, which could be the obstacle. If almost all sound waves are reflected, then usually the reason for a body of water is reached. But if only a part of the sound waves comes back, it could also be rock formations, shipwrecks, plants or just fish.

How precise the results depend, above all, on the frequency of the ultrasonic waves. The higher the frequency, the more details can be captured, as the encoder can work with more sound waves. The disadvantage of a high frequency, however, is the comparatively short range. Because the lower the frequency, the further the sound waves can propagate. To determine the depth of water, therefore, low-frequency vibrations are recommended. Many fish finders also use two different frequencies to combine the advantages of both variants.

When using an echo sounder, in any case, expert knowledge of the user is required. Because the results of a measurement always have to be interpreted correctly. Although there are some devices that do this automatically, the forecasts are never 100% reliable. Only the experience tells an angler what he has encountered in a measurement and what he has to pay attention to. For example, it is important to determine the speed of sound in the water.

This depends on several factors, such as the salinity of the water, the temperature, and the pressure. Only with a usable output value can be calculated with the echo sounder and precise distance information. So even if fish finders bring many benefits to an angler, they still can not do all the work.

When looking at the technology, it also shows that the name fish finder is not entirely correct. Because no device is actually able to find fish for sure. The echo sounders only give indications of possible shoals of fish.

10 tips and tricks for optimal use of the fish finder

For all new fish finder beginners, we have summarized in the following 10 tips and tricks that can facilitate the entry into the matter in part significantly.

Tip # 1. Choose the right fish finder

Tip # 1. Choose the right fish finder

It is important to choose the right fish finder before buying. For first steps, it makes little sense to resort to expensive models with great features. Beginners can do little with most additional features anyway. In addition, it must also be clear to everyone in which waters the fish trap should be used. If you want to fish or dive in shallow waters with a depth of up to 5 meters, you do not have to resort to a model with a long range.

Tips # 2. Familiarize yourself with the device

Tips # 2. Familiarize yourself with the device

Everyone should become familiar with his fish finder before the first mission. Get to know the device and get a picture of all functions. The manual is always a good companion. It answers all possible questions and helps you get started on the matter. Especially on the first trips, it is, therefore, a good idea to take the manual with you.

Tip # 3. Perform several measurements

Tip # 3. Perform several measurements

In order to achieve the highest possible precision, it is advisable to carry out several measurements at once. In this way, any errors in a single measurement can be better excluded. Although professionals are often well served with just one measurement, beginners should not shy away from using the fish finder extensively.

Tip # 4. Start small

Tip # 4. Start small

If you have no or little experience with a fish catcher, you should do so first in shallow waters. The flatter the water, the more accurate the measurements of a fish knife. Even very cheap models perform here already good services. In this way, anglers can get used to the operation of their fish finder. The knowledge gained through this is later helpful when exploring deeper waters.

Tip # 5. Understand the results of the fish finder

Tip # 5. Understand the results of the fish finder

It is essential for every angler and diver to be able to correctly interpret the results of the fish finder. A color display is certainly a good help, but not a must. Good fish finder provides all the important clues in the manual, but otherwise, the Internet is a great place to go. Incidentally, there are also differences between the individual fish finders in terms of the way in which they are presented.

Tip # 6. The right care

Tip # 6. The right care

A fish finder can only work reliably if well cared for. This includes, above all, laying the cables correctly and protecting them adequately against external influences. In addition, it is also necessary to regularly check a device for its functionality, so that it does not come to incorrect measurements later.

This can easily be checked in shallow waters, where obstacles are already visible to the naked eye. If the fish finder does not display it correctly, a repair or a new device may be necessary. Such a functional review is recommended approximately every 6 to 12 months. Of course, the device should always be treated carefully and well.

Tp # 7. Healthy mistrust

Tp # 7. Healthy mistrust

Even fish finder can be wrong. Therefore, a healthy dose of skepticism in use is not wrong. Whenever you have doubts about the measurements, it makes sense to perform a new measurement. Only with reliable information fish finder help to success. Not a few models also have a certain susceptibility to errors. Therefore, with very good echo sounders nobody should rely too much on the results but also listen to their own experience.

Tip # 8. Keep Calm

Tip # 8. Keep Calm

Fishfinders work best when the boat is calm on the water. A moving boat, on the other hand, can distort the results. Of course, it is not always possible to achieve a complete shutdown. But the boat should be kept as calm as possible during a measurement. It makes little sense to go over a lake with a motorboat and constantly carry out measurements. The information gained from this hardly helps in the search for fish or other things at the bottom of the water.

Tip # 9. The correct placement

Tip # 9. The correct placement

Of course, for a fish finder to work properly, it must also be placed correctly. Where exactly the best position is, of course always depends on the boat. In general, however, offers a place at the stern, where the fish finder in the best case has contact with the water. Only then can he also output information about the water temperature. If this is not possible, most devices can also be placed inside a boat.

Tip # 10. Nothing replaces experience

Tip # 10. Nothing replaces experience

After all, a fish finder does not help as well as your own experience. So just stay on the ball and do not be discouraged by any failures. Each time you use your fish finder, you will learn something new and over time, you will become an expert on your own.

Useful accessories

Lowrance 000-11824-001 Mark-4 FishfinderAccessories for fish finders are available mainly in the form of spare parts. These are not only suitable for replacing defective parts, but also for upgrading an existing device. With a new, higher-quality encoder, for example, the precision or range can be significantly improved. In addition, some models can also be retrofitted with a temperature gauge.

Essential for every fish knife is silicone, which makes it easy to attach both the device and the cables. The material has the advantage that it is not only very stable but also waterproof. It keeps the water safely away from the electronic components of a sonar.

Another interesting accessory is a so-called switch. It is the principle of a cable that can be connected to a transmitter and two terminals. As a result, more than one person can read the results of measurements simultaneously. For trips with friends or acquaintances, such a switch is particularly useful.

Due to the simple design of fish finders, there are not many other accessories. Noteworthy are still speedometer but are only interesting for special requirements. Who has problems with the installation, but after a short search also helps such as the mounting bracket or the like. But in most cases, fish finders deliver everything that is necessary for a smooth operation even when delivered.

If you are still planning to buy accessories, you should make sure that the fish finder is compatible at all when buying the fish finder. That does not apply to all devices. Especially the cheapest versions often allow no attachment of accessories.

Alternatives to the fish finder

There are no real alternatives to a fish finder. Although there are some ways to change the depth of the water, anglers and divers are not provided with any information about any obstacles or even fish in the water. Anyone who already knows good hot spots or has recommended ones can certainly go fishing without a fish finder. But there is no way around a good fish finder for those who want to do this hobby more committed.

In very well-known waters like the Baltic Sea, there are many pieces of information about the condition of the seabed as well as some tips about fish stocks on the internet. For the beginning, this is certainly very helpful, but without own fishing with GPS anglers still, have to reckon with disadvantages. For one thing, they do not have up-to-date information at any time.

Schools of fish are not stationary structures that would always find themselves in the same place. Instead, they are constantly on the move. A precise location is, therefore, possible only in real time. In addition, all those who rely on external sources of information limit themselves to a small selection of waters.

Useful links:

Below we present you some interesting links that provide valuable information about the fish finder. For example, at there is a huge database of fish that helps determine fish species. Once found, fish stocks can be better categorized based on the species.

In the forum of, there are always interesting discussions about fish finders and other technical support devices. Also, new developments treat the numerous users there regularly. Last but not least, they can also answer many questions that beginners are always asking themselves.

If learning with visual content and graphics examples are easier for you, the Fishfinder Tutorial on YouTube is certainly interesting. There, a seasoned angler will give tips for using the equipment. Although it refers to a specific model, the tips are still useful for other models.


1 Stern2 Sterne3 Sterne4 Sterne5 Sterne (1,652 Ratings. Average: 4.70 von 5)