Your Sleep Data Never Leaves Your Device
Most sleep apps send your audio to the cloud. Snollo doesn't. All snore detection and sleep analysis happens on your iPhone using on-device AI — your recordings never touch an external server.
How Snollo keeps your data private
Your Microphone
iPhone captures audio during sleep. Raw audio is never saved to disk or transmitted anywhere.
On-Device Core ML
Apple's Core ML framework classifies sounds and maps sleep stages entirely on your iPhone. Zero bytes leave your device during analysis.
Your Private iCloud
Results are saved to your private CloudKit container — encrypted, isolated to your Apple ID. Snollo has no access to read or write this data.
There is no "Snollo server" step in this flow.
We operate no infrastructure that touches your sleep or audio data. There is nothing to breach, sell, or subpoena.
What we literally cannot see
Your audio recordings — processed in-memory by Core ML, never written to any Snollo server
Your sleep scores or history — stored only in your iCloud CloudKit private container
Your sleep stage data — written to Apple HealthKit under your Apple ID, not ours
Who you are — no account, no email
Your device location or usage patterns — we collect zero personally identifiable data
How the top sleep apps handle your data
Based on App Store privacy labels, Common Sense Privacy evaluations, and published privacy policies.
| App | Cloud Audio Processing | Account Required | Data Selling | Ad Tracking |
|---|---|---|---|---|
| Snollo ★ | ✓ No | ✓ No | ✓ No | ✓ No |
| SnoreLab | ✗ Yes | ✓ No | ? Unclear | ✗ Yes |
| Sleep Cycle | ✗ Yes | ✗ Yes | ? Unclear | ✗ Yes |
| SleepWatch | ✗ Yes | ✗ Yes | ✗ Yes | ✓ No |
| AutoSleep | ✓ No | ✓ No | ✓ No | ✓ No |
| Pillow | ✓ No | ✓ No | ✓ No | ✓ No |
Sources: App Store privacy labels, Common Sense Privacy evaluations, published privacy policies. Last reviewed April 2026.
The private sleep tracker you've been looking for.
No account. No cloud. No data selling. Just your sleep data, processed on your iPhone, stored in your iCloud.
Download Free on the App Store