Your sleep,
explained.
Only to you
Snollo is a private sleep tracker for iPhone and Apple Watch. On-device AI detects snoring and analyzes sleep stages. Your recordings never leave your device — stored only in your iCloud.
Set it up in 10 seconds. Sleep. Learn.
Snollo doesn't auto-start. Open the app and tap Start before bed — otherwise nothing is recorded.
Wear an Apple Watch to add heart-rate, breathing, and blood-oxygen charts (requires Apple Health permission). Without a Watch, place your iPhone on the bed near you and grant Microphone + Motion & Fitness permissions so sleep stages can be detected. Data only appears once the matching permission is granted — that's Apple's privacy model, and Snollo follows it.
Tap Start Before Bed
Open Snollo and tap Start. Tracking does not begin on its own. Place iPhone on the bed near you if you sleep without an Apple Watch; the nightstand is fine if you wear one.
Snollo Listens While You Sleep
Overnight, entirely on your iPhone — no third-party servers. Every sound identified. Every sleep cycle mapped. Saved to your private iCloud.
Wake Up Knowing Why
Open Snollo in the morning. Your score is ready. Your clipped sounds are waiting. Listen back and finally understand your nights.
Snollo vs. Other Sleep Apps
The only sleep tracker that combines Apple Watch sleep stages with on-device snore detection — all on the free tier.
Competitor features and pricing based on publicly available information as of April 2026.
Want the full breakdown? See our roundup of the best free sleep tracker apps — which ones are genuinely free with no subscription, and which lock the useful features behind a paywall.
Your Sleep Data Stays Yours — Privacy-First by Design
We built Snollo so your sleep recordings and analysis live on your iPhone and in your own iCloud — across the Apple devices you sign into. No separate Snollo account. No selling your information.
See your sleep tracker in action.
Score, REM, Deep & Light cycles with heart rate
Record snore, breathing & dream talk
Layer white noise, rain, forests, meditation — sleep timer included
A clear read on last night — and what to change tonight
What Snollo Users Are Saying
"This app changed my mornings. The sleep stage breakdown is eye-opening, and knowing my data is private makes me feel secure."
"Finally found out why I was so tired. The snoring detection caught exactly what was happening in the middle of the night."
"Clean interface, no subscriptions forced down your throat, and the Apple Watch integration is flawless."
Built for three kinds of iPhone users
"I want to actually hear what I'm doing overnight — and finally do something about it."
You snore, you're pretty sure you snore, or your partner says you snore. Snollo records classified audio clips so you wake up with evidence: timestamps, intensity, and playback — not just a number.
"I already wear my Watch to bed. I want the most accurate sleep stage data possible."
Snollo combines Apple Watch heart rate variability, heart rate, SpO₂, and motion with iPhone microphone snore detection. You get REM, Deep, and Light stage breakdown plus a full sound timeline — one app, both sensors.
"I'm not sending 8 hours of bedroom audio to a company's servers. That's not a trade-off I'm making."
Sound classification runs entirely on your iPhone. Raw audio is processed in memory and discarded; only event metadata and the clips you save go to your own iCloud, under your Apple ID — across the Apple devices you sign into.
Free to start. Premium when you're ready.
Prices shown for your region, fetched from the App Store. Apple handles all billing.
Cancel anytime in Settings → Apple ID → Subscriptions.
Frequently Asked Questions About Sleep Tracking
Do I need an Apple Watch to use Snollo?
Do I need to start tracking each night?
Where should I put my iPhone at night?
What permissions does Snollo need?
How accurate is the snoring detection?
Where is my sleep data stored?
Does it drain my battery overnight?
Does Snollo share my sleep data with anyone?
What sleep stages does Snollo detect?
What's the difference between Snollo free and Premium?
Does this sleep tracker work without Apple Watch?
Can Snollo detect snoring without Apple Watch?
Is Snollo free?
Does Snollo work on iPad?
What happens if I cancel Premium?
How does Snollo compare to Apple's built-in Sleep app?
From the Snollo blog
Evening Workouts and Sleep Quality: How Late-Night Exercise Affects Your Rest
Regular physical activity improves sleep, but does hitting the gym late do more harm than good? Learn how exercise intensity, timing, and your buffer window affect your rest.
The Science of Weighted Blankets: How Deep Pressure Affects Sleep
Weighted blankets use deep pressure to calm your nervous system and reduce restlessness. Learn how they work, the 10% weight rule, and safety considerations before you buy.
The Science of Sleep and Temperature: Why Bedroom Climate Is Key to Rest
Your body must cool down to fall asleep. Learn how bedroom temperature affects your sleep cycles, the ideal range for your age, and how to set up your room for deeper recovery.
Try it tonight.
Your sleep data is yours. It lives on your iPhone and in your iCloud — across the Apple devices you sign into.
Download on App Store