Somnul

Last updated: September 18, 2026

Somnul is a small app with no account, so most problems fall into one of the handful below. If yours is not here, email ootssu@ootssu.com.

Recording a night

Put the phone on the nightstand and tap Start tonight. Somnul keeps measuring after the screen locks. In the morning, tap I'm awake to end the session and see the report.

Two things to check the first time: give microphone access when asked, and leave a few hundred megabytes free. Somnul refuses to start rather than dying at three in the morning if storage is too low.

"Part of this night was not recorded"

iOS hands the microphone to whatever needs it most, so a phone call, an alarm, or another recording app stops the measurement. Somnul tries to resume, and when it cannot it records the stretch it missed and shows it on the report instead of quietly scoring a partial night as a whole one.

To make it rarer: turn on Do Not Disturb or a Sleep Focus, close other apps that use the microphone, keep the phone on a charger, and leave storage free. If coverage is low every night with none of those explanations, tell us what the report showed.

The score does not look right

The score is how much of the measured night was spent making noise, weighted so louder seconds cost more — a whole night of loud snoring is 100. Two things move it more than people expect:

• Where the phone is. Further away, or face-down on soft bedding, measures quieter.
• The room's background noise. Loudness is measured relative to the room, so a fan or an open window raises the bar a sound has to cross.

Sensitivity in Settings adjusts how readily a sound counts. If a fan or air conditioner is being picked up as noise, try a lower sensitivity and move the phone slightly further from it.

Restoring your purchase

Somnul is a one-time purchase tied to your Apple Account. On a new phone, or after deleting and reinstalling, tap Restore purchase on the payment screen or in Settings. As long as you are signed in to the same Apple Account, it unlocks again and you are not charged.

If Restore does not find it, check that you are signed in to the Apple Account that made the purchase — a different account cannot see it. Then check your network connection: verifying a purchase is the one thing Somnul needs the internet for.

The price will not load

If the payment screen shows no amount and the button is greyed out, Somnul could not reach the App Store. It deliberately shows nothing rather than a made-up figure. Check your connection and reopen the app.

Deleting your data

Everything is on your device. Settings → Delete all recordings removes every stored night, and deleting the app removes its storage entirely. Audio is also deleted automatically once the retention period you chose — 3, 14, or 30 days — has passed.

There is no account and no server copy, so there is nothing to request from us and no deletion request to file.

Refunds

App Store purchases are refunded by Apple, not by us. Request one at reportaproblem.apple.com.

A note on what this app is for

Somnul measures sound. It is not a medical device and does not screen for sleep apnoea or any other condition. If something about your sleep or breathing worries you, please take it to a healthcare professional rather than to a score in an app.

Contact

Email ootssu@ootssu.com. Telling us your iPhone model, your iOS version, and what the report's coverage said makes a recording problem much faster to work out.