Recording audio overnight is inherently personal.

A sleep recorder may capture far more than snoring or sleep talking.

It can also pick up:

private conversations

another person in the room

alarms

environmental sounds

background audio

moments the user never intended to share

That makes privacy part of the product design, not just an optional setting.

Private audio should stay understandable

When users record overnight, they should be able to answer a simple question:

Where does this audio go?

For a privacy-focused recorder, the answer should be easy to understand.

Ideally, users should know:

whether recordings stay on the device

whether anything is uploaded automatically

whether an account is required

how long clips remain stored

when something leaves the app

The fewer hidden transitions there are, the easier the product is to trust.

Local processing reduces unnecessary exposure

Sound detection does not always need a remote server.

If the device can detect relevant audio activity…