As the name implies, SonarPhone turns your smartphone or tablet into a fully functional touch screen sonar system that will rival the performance of sonar systems costing hundreds more. You don’t need cell phone coverage to use it, the SonarPhone Sonar Transmitter will work anywhere in the world. The SonarPhone transmitter creates its own WiFi hotspot and you can share its signal with as many people as you wish or password protect it just for yourself.

To use the SonarPhone App in anything other than “Demo Mode” you will need to connect to an existing SonarPhone Sonar WiFi Transmitter or purchase one of the three options yourself. The T-POD (SP100) is a ultra portable WiFi transmitter systems that has a self contained battery and can be pulled behind your boat, cast or thrown from shore. The T-BOX (SP200) is a more permanently mounted system that is mounted in a boat with access to a 12 volt power supply (not included). Or the T-BOX (SP300) which is the T-BOX mounted on its own 12 volt battery pack to make it more portable.

SonarPhone delivers a multi-color color display plus it offers a robust menu of features you will be able to “Test Drive” by downloading this SonarPhone App and play the system in the “DEMO” setting.

The SonarPhone App includes 17 language options: English, Spanish, German, Polish, Korean, Japanese, Chinese, Portuguese, Dutch, Finnish, Russian, Italian, Czech, Danish, French, Swedish and Greek.

For a limited time, all SonarPhone Sonar/Transmitter systems come with a bonus gift! A SmartPhone neoprene armband so you will have easy and safe access to your phone display at all times.

Depth Sounder Features

> Automatic Ranging
> Transmit Range: 90 yards
> Water Temperature, Depth Indicator
> Audible Alarms for Fish/ Shallow/Low Battery
> Fish Icon
> Zoom Bottom Track
> Noise Rejection
> Surface Clarity
> Battery Indicator
> Screen controls: Touch screen, split screen display with touch screen zoom control.

Specifications - SP100 Wi-Fi Transducer Pod

> Usage: Impact resistant chassis. Cast it or troll it.
> Transducer: Water activated transmitter
> Max depth range: 120 feet
> Sonar frequency: 125 kHz
> Single Beam: 30º
> Power source: 3.7V rechargeable battery.
> Runs for 4 continuous hours per charge.
> USB port charging system.
> Power output: 400 watts peak-to-peak
> Transmit speed: 100 Mbps
> Screen controls: Touch screen controls
> One year warranty

Specifications - SP200 & SP300 Wi-Fi Boat Sonar

> Permanent boat installation: (#SP200 only)
> Portable boat installation w/suction cup transducer bracket: ( #SP300 only)
> Transducer: High-speed skimmer-style transducer with keel offset and 6 meters of cable.
> Max depth range: 240 Feet
> Sonar frequency: 200/83 kHz
> Dual Beam: 20º/40º
> Power source: 12V DC power
> Power output: 800 Watts Peak-to-Peak
> Transmit speed: 100 Mbps
> One year warranty
> Included 12V, 4.5 amp-hour battery and charger. (#SP300 only)
> Carry case with 12 volt battery and charger: (#SP300 only)

What’s New

Version 3.29

Bug fix for display problems if using dark mode.

Ratings and Reviews

3.1 out of 5
27 Ratings

27 Ratings

Jefferson76 ,

Highly recommend, incredible value!!

Completely changed my review from 2 stars to 4. I now highly recommend this app. Important trick, you can drag from the gain arrow buttons in any direction to make them behave like a slider, but only in the direction of the button you initially touched. If you use SonarPhone with the Navonics app, you have the best value in boating/fishing electronics period. The interface still needs a lot of work but I can now live with it. The only big omission now is no real time only display. Come on Vexilar, give me a five star update soon.

Update: with the real time bar now bigger and color coded I really love this app and product. This is something I asked for and they said they would do it and they did. So why not five stars yet? The interface is still not great. It would be so much better if they just used the built in iOS interfaces for the menus. For example when changing chart speed if you want to go from say 60% to 100% you have to make four large swipes where with the iOS selection wheels you could do it in one simple slide. Good thing menu items aren't frequently changed though so…

Nearly perfect.

TheOnlyCashper ,

Overall good app and product!

I am very pleased with the product and the app that comes with it is nice. The app has good functionality and just like it says gives you the visual display like higher priced depth finders. Having the ability to use more than one device at a time is also a nice feature. It seems somewhat laggy at times but overall it is minor when it occurs. The app seems older looking but that is understandable due to older and other devices that can run it which is nice that i can use my old iPhone 4 when my 6s plus runs out of battery or just as a backup. I give this app a 2 thumbs up overall and a 4 star rating. 👍👍

RD901 ,

Worth the price

I tried this unit out on the back of a Ranger Bass boat and compared it to a Humming Bird depth finder and found the display to be the same. Two issues I had problems with: 1. The one suction cup could not hold the transducer during normal run speeds across the lake . The transducer would turn sideways . 2. When going into screen settings any changes made were difficult to undo. I had difficulty getting the settings display to close. Overall I feel that with time I will become a better operator but for now I give this unit four stars.

App Privacy

The developer, Vexilar, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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