FAQ

What does SingLift Sustain measure?

SingLift Sustain measures stable sustained-tone duration: how long a sustained tone remains stable enough during use.

Does SingLift Sustain record my audio?

No. Audio is not recorded, and audio files are not stored.

Is audio uploaded?

No. Audio is not uploaded to the cloud for measurement.

Are measurement results saved?

Yes. Measurement results are saved on your device so the app can show measurement history and Personal Best.

What is a measurement day?

A measurement day is a local calendar day on which a completed measurement is saved. Days without completed saved measurements do not count as measurement days.

What happens after the 5 included measurement days?

Continued measurement after the included days requires a one-time purchase. Existing measurement results remain part of the saved history on your device.

Is there a subscription?

No. SingLift Sustain uses a one-time purchase for continued measurement. There is no subscription and no automatic renewal.

Does SingLift Sustain give me a score?

No. SingLift Sustain reports stable duration rather than evaluating or comparing users.

Is SingLift Sustain medical or instructional?

No. SingLift Sustain does not provide medical advice, diagnosis, singing instruction, or a guarantee of improvement.

How do I restore a purchase?

Use Restore Purchase in the app. Make sure you are using the Google account that made the one-time purchase and that Google Play is available on the device.