Generate pure sine wave tones at frequencies from 20hz to 22,000hz. Tone generation is useful in tuning instruments, hearing tests, science experiments, and testing audio equipment.

Tone Generator has many uses:
- Hearing Test: What is the lowest/highest frequency you can hear in each ear?
- Tuning Instruments: Does your top guitar string match Low E at 440 Hz?
- Science Experiments: What is the resonant frequency of your wine glass?
- Audio System Test: What frequencies does your subwoofer support?

Adjust audio frequency by dragging the slider or tapping the plus/minus buttons. Adjust device volume using the on-screen volume slider. You can also specify to play audio to any AirPlay supported device. Toggle audio playback using the Play/Pause button.

Created by the audio experts at TMSOFT that brought you the famous White Noise app. Check out all our apps and sounds at

What’s New

Version 1.2

Updated libraries to be GDPR compliant and other minor improvements.

Ratings and Reviews

4.6 out of 5
81 Ratings
81 Ratings
aaronchasemusic ,

Tons of potential

I love that it’s simple, but it’s a little bit too simple. Its almost impossible to choose a specific frequency on the high end. There’s a plus and minus button that moves up or down one single hz, which is practical at 60 hz, but silly at 16,237. You can also drag the slider but its nearly impossible to set it to 16,000 or 18,000 or 15,500, or anything specific. You have to settle for 18,342 and be grateful that you got that close, or maybe if you really want push the minus button 342 times to get to your goal frequency. Also it doesn’t make sounds while you’re sliding the slider.

Perhaps being able to zoom in on the frequency spectrum to get to specific spots, or as Apple does, a low speed scrub as you move your finger further from the slider. Idk, but it needs something.

Almost a great app, but falls short of being useful.

Developer Response ,

Thank you for your feedback! We do appreciate providing us insight on your thoughts about the app. We will taking your feedback into consideration and see if these are updates we are add to a future version. We appreciate you taking the time to let us know what you think!

popoperez ,

I like 38 hz find the one that is good for you. It worked for me. Read about Tesla.

I like 38 hz it works for me find the one that works for you. Read about Tesla.

I started about 3 weeks ago and I have been reading about light frequency and power. This application is great I donated for further research. You don’t have to donate anything only if you wish.

FFiend ,

Good utility, but could be improved

The sound output drops out while dragging the frequency slider, instead of producing a continuous tone. The frequency slider is also a bit unstable, swishing the frequency up/down by occasionally significant amounts when my finger lifts off the control, which requires using the fine-tuner to restore the desired setting. If you want to dial in a frequency to match another source, this tool will not be precise enough for you.

Developer Response ,

Version 1.1 now supports 1hz increments. Cheers!


15.8 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, Spanish
Age Rating
Rated 4+
© 2017-2018 TMSOFT, LLC


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