iPhone Screenshots


Sonar Utility uses sound to measure distance. But it is so much more than a ruler. It is the first iPhone app for generating 360° sonic images that show surfaces like walls, obstructions, openings (e.g., doorways), and other features. Use it to "see" in the dark. Sonar Utility is also a thermometer that estimates the ambient temperature using the physics of sound.

Note: For best results this app should be used in quiet environments. Works best with older iPhones (e.g., iPhone 4s).


Waveform: 5000-20000 Hz noise modulated "chirp"
Sampling Frequency: 44100 Hz (0.3 inch accuracy at 72°F)
Range: 9 inches to 30 feet (0.23 - 9.14 meters)

Go to our web site for more information.

What's New

Version 1.4

Add button to plot range vs. time for science experiments.

Ratings and Reviews

Drakonmaster ,

Doesn't work

It can't tell the difference between one foot or ten.

Bossfbi77 ,

Sonar utility re-view

Hockey-Cow!!! This app almost make me crap in my pants. Don't try at night especially when alone. You might find a some sort of freaking creature watching you. It does work like it say, use sonar and temperature sensing to scan around just like radar. It's really nice app, it show in dark what's hidden if its alive or not and shape. I know many people are not believe in superstitious story but when I scan my room around I did found something float warm in air about 5 feet in diameter and 3 feet away. And I was alone in the room. Any suggestions? This is freak me out.

TheSanDiegoGuy ,

Works great on iPhone 4s

In preliminary experiments, it's giving accurate measurements. But the clicking gets kind of annoying...


Mark Carlotto
1.3 MB
Requires iOS 8.2 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© Intelligent Gadgets


  • Family Sharing

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

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