OctaveChecker app for iPhone and iPad

How many octaves is your vocal range?
This app can easily measure your vocal range.

[How to measure your vocal range]
1. Push a start button
2. Produce a voice at the lowest comfortable pitch for a longer than 1 second
(The frequency meter will respond)
3. Produce a voice at the highest comfortable pitch for a longer than 1 second
(The frequency meter will respond)
4. Push the stop button

[Notes]
- Please measure your vocal range in a quiet environment.
- It is easier to make a measurement if your voice is loud and at a consistent pitch
- Measurement will automatically stop after 12 seconds.
- Measurement can be inaccurate for some vocal qualities.