Opening the iTunes Store.If iTunes doesn't open, click the iTunes application icon in your Dock or on your Windows desktop.Progress Indicator
Opening the iBooks Store.If iBooks doesn't open, click the iBooks app in your Dock.Progress Indicator

iTunes is the world's easiest way to organize and add to your digital media collection.

We are unable to find iTunes on your computer. To download the free app Active Sonar by Apptomic LLC, get iTunes now.

Already have iTunes? Click I Have iTunes to open it now.

I Have iTunes Free Download
iTunes for Mac + PC

Active Sonar

By Apptomic LLC

Open iTunes to buy and download apps.


Top 100 overall in 48 countries!
Top 10 overall in 17 countries!

-Instantly measure distances with high frequency sonic pulses
-Color coded echo location display
-Simple easy to use interface
-US and Metric units configurable

Bats navigate through the night air by emitting high frequency sonic pulses and listening for echoes. Submarines use a similar technique to determine the distance and location of underwater targets. Now you can have bat-like vision on your iPhone with Active Sonar!!

Active Sonar emits a high frequency sonic pulse and listens for echoes that that bounce off of objects. The distance the echo has traveled is instantly computed and graphically displayed in a color coded format showing the distance and strength of the echo. Active Sonar will allow you to instantly and accurately measure the distance to objects, such as a wall, up to 12 feet away.

How does Active Sonar work?
Once Active Sonar emits a high frequency sonic pulse, any return echoes that bounce off of objects are detected using iPhone’s built-in microphone. The amount of time that has elapsed from emitting the sonic pulse to detecting the return echo is used to calculate the distance the sonic pulse has traveled. Given the know speed of sound at a particular room temperature (approximately 1125 ft/s), the distance the sonic pulse has traveled can be computed by multiplying the speed of sound by the amount of time the sound has been traveling. Using this calculation, Active Sonar instantly computes the precise distance the echo has traveled.

Active Sonar is easy to use!
Step 1: Turn up the volume.
Step 2: Point iPhone’s built-in speaker at an object.
Step 3: Turn on Active Sonar.

Following these three simple steps will enable you to see with bat-like vision!!

-Only measure objects more than 2.5 feet away from the iPhone
-Noisy environments can interfere with measurement accuracy
-Please read the instructions in the app by touching the info button just above the on button

What's New in Version 1.1

-Per customer reviews I have moved the ad banner.
-Improved range finding.
-Fixed some small bugs.

Please write a review if you suggestions on how to improve this app.

iPhone Screenshot

iPhone Screenshot 1

Customer Reviews

Works Great!!

I'm impressed with this app, and think it works reasonably well as long as you follow the instructions in the "info" button. I also think it helps for the room to be fairly quiet so the microphone can pick up the correct sounds.

Give it an honest try and I think you will be pleased.

P.S. The instructions clearly state that the object needs to be at least 2.5 feet away, not just a few inches like some of you that have posted bad reviews have tried. Once again, follow the instructions. It works!

I had my doubts

This app is very impressive. Granted the the hardware is limited but the app makes use of what there is. The spectra graph the important part to me. Note to developer: to shut up the whiners who complain about not having a circle graph next time just take polar data by using the compass and convert to rectangle form and graph to create a 2d map of a room and thus make a classic "circle graph" like in the app icon.

Works well

This works well. You need to understand that every faint line seen is an echo. You measure the distance by taking a reading from the most prominent line. It will bounce sound off of everything in the room not just what you're aiming at. Sonar requires a speaker to transmit, a microphone to receive and a trained eye to interpret what is seen. Read the directions!!! Great ap!!!

Active Sonar
View In iTunes
  • Free
  • Category: Utilities
  • Updated:
  • Version: 1.1
  • Size: 0.9 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 2.2.1 or later. Compatible with iPhone.

Customer Ratings

Current Version:
All Versions:

More iPhone Apps by Apptomic LLC