iPhone Screenshots


Tone Generator Ultra is a simple and easy-to-use test tone and frequency generator. Tones can be set by frequency or musical note.

-Sine, Square & Sawtooth Wave Generation
-Chromatic pitch detection from external sources
-Configurable A4 callibration
-White and pink noise
-Multi-tone generator
-Impulse wave
-Supports frequencies from 20Hz to 22kHz
-Logarithmic / linear sweep utility with
adjustable upper and lower frequencies
and delay

Tone Generators are very useful for a variety of tasks including:
- Balancing your Stereo or Home Cinema System
- Testing Speakers
- Acoustics testing
- White and Pink Noise Generator

Can be used inconjunction with PocketRTA Ultra Spectrum Analyzer for the iPhone.

Or for fun
- Compare your friends hearing, see who is straining to hear the sounds
- Annoy your best friend with that pesky sound.
- But definately not to be used to annoy your teachers.

What’s New

Version 1.08

Minor Bug Fixes

Ratings and Reviews

3.1 out of 5
7 Ratings

7 Ratings

i-Phone-4 ,

Need BT connection

Love this app. More so when equip with A2DP for BlueTooth connection, as an alternative to hard wiring.

nick i ,


Best frequency generator ever.
Let me start off by saying that I have used all of the tone gens and none of them do what this one does. Paid apps included. If you don't know audio this app could be a bit overwhelming at first but the UI is just so simple, I love it.

Seriously, I've used them all, I just wish you would expand the range down to 5 Hz. I know the current generation iDevice's DACs don't go up past 22,000 without immense amounts of drop off but it would be nice if you push that up to 30,000. After all when you get into great audio systems this is really what separates the boys from the men.
Best app ever! Highly reccommend! GET IT GET IT GET IT!

c0d3h4x0r ,

Doesn't keep playing in background

This app is worthless because it stops playing sound when you switch away from it, even with the "Keep Alive" setting enabled in the app. How am I supposed to switch to my RTA app to analyze the results of piping the tones through my PA if this app stops making sound when I switch away from it?!?

App Privacy

The developer, 4Pockets.com, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


Limelight Software
3 MB

Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
In-App Purchases
  1. Unlock Tone Generator Ultra $1.99


  • Family Sharing

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

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