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5.0 on App Store

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.

Download on App Store How it works
Snollo — AI sleep tracker app for iPhone and Apple Watch
How It Works

Set it up in 10 seconds. Sleep. Learn.

Wear your Apple Watch. Place your iPhone near you on the bed. Snollo handles the rest.

Step 1

Start Sleep Tracking

Tap once before bed. Your iPhone listens. Your Watch tracks heart rate, movement, and breathing.

Step 2

AI Works While You Sleep

Overnight, entirely on your iPhone — no third-party servers. Every sound identified. Every sleep cycle mapped. Saved to your private iCloud.

Step 3

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.

Compare

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.

Feature comparison: Snollo vs Sleep Cycle vs SnoreLab vs Pillow
Feature Snollo Sleep Cycle SnoreLab Pillow
Audio processed on-device Always Cloud Cloud On-device
Apple Watch sleep stages Free Subscription Not available Free + Premium
Snore detection Free Subscription Free (limited) Premium only
Audio clip playback Free No Yes Premium only
No account required Always Required Optional Required (premium)
Subscription required Optional Yes (~$40/yr) Yes (~$40/yr) Yes (~$40/yr)

Competitor features and pricing based on publicly available information as of April 2026.

Privacy First

Your Sleep Data Stays Yours — Privacy-First by Design

We built Snollo so we literally cannot see your data. No accounts, no central servers, no selling your information.

Your Microphone Input
Your iPhone On-Device AI
Your iCloud Private Storage
App Preview

See your sleep tracker in action.

Sleep quality score with REM, Deep, Light sleep stages chart and heart rate tracking
Sleep Quality & Stages

Score, REM, Deep & Light cycles with heart rate

AI snoring detection and dream talk recording with sound timeline
Sound Detection

Record snore, breathing & dream talk

Sleep sounds mixer with white noise, nature, and ambient sound categories
Sleep Sounds

Mix white noise, nature & ambient sounds

Sleep statistics with weekly insights, AI recommendations and sleep history
Smart Insights

AI-powered statistics & recommendations

Wall of Love

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."

S
Sarah L.
Feb 12, 2026
★★★★★

"Finally found out why I was so tired. The snoring detection caught exactly what was happening in the middle of the night."

M
Mark D.
Jan 28, 2026
★★★★★

"Clean interface, no subscriptions forced down your throat, and the Apple Watch integration is flawless."

E
Elena G.
Feb 05, 2026
Who It's For

Built for three kinds of iPhone users

S
The snore investigator

"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.

Sound clips Snore timeline Listen-back
A
The Apple Watch power user

"I already wear my Watch to bed. I want the most accurate sleep stage data possible."

Snollo combines Apple Watch HRV, 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.

HRV tracking REM / Deep / Light SpO₂
P
The privacy-conscious

"I'm not sending 8 hours of bedroom audio to a company's servers. That's not a trade-off I'm making."

Snollo's CoreML model runs entirely on your iPhone. Raw audio never leaves the device. Your sleep history lives in your private iCloud container — not on Snollo's servers, because Snollo has none.

On-device AI Zero servers No account
FAQ

Frequently Asked Questions About Sleep Tracking

Do I need an Apple Watch to use Snollo?
No — Snollo works as a sleep tracker for iPhone without an Apple Watch. Just place your iPhone on the nightstand and it will detect snoring via microphone. The Apple Watch adds more accurate heart rate data and detailed sleep stage breakdowns (REM, Deep, Light), but it is entirely optional.
How accurate is the snoring detection?
Snollo uses Apple's CoreML framework to analyze audio on-device in real time. In our testing, it accurately identifies snoring, breathing patterns, coughing, and sleep talking. You can listen back to any detected sound to verify it yourself.
Is my data secure?
Snollo processes everything on-device using Apple's CoreML. All saved data is stored in your private iCloud account. Snollo has no servers and no access to your audio recordings or sleep history.
Does it drain my battery overnight?
In our tests, overnight iPhone battery drain is typically 10–15%. We recommend keeping your phone plugged in if you use the continuous audio recording feature.
Does Snollo share my sleep data with anyone?
Snollo is built so it cannot access your data. All audio processing happens on your iPhone using Apple's CoreML. Recordings are stored exclusively in your private iCloud container. Snollo has no servers, no accounts, and no mechanism to transmit your sleep data — ever.
What sleep stages does Snollo detect?
Snollo tracks Light sleep, Deep sleep (slow-wave), and REM sleep using data from your Apple Watch heart rate and motion sensors. Each morning you get a full breakdown of your sleep architecture — how long you spent in each stage and how it compares to your personal baseline.
What's included without Premium?
The core app includes AI sound detection, basic sleep stages, Apple Watch integration, and 7 days of history — no subscription required. Premium adds unlimited recordings, full history, the complete sound library, and detailed weekly stats.
Does this sleep tracker work without Apple Watch?
Yes — Snollo is a sleep tracker for iPhone without Apple Watch. Place your iPhone on the nightstand and it uses the microphone for snoring detection, breathing analysis, and sound classification. Apple Watch adds heart rate-based sleep stages (REM, Deep, Light) but is entirely optional.
Can Snollo detect snoring without Apple Watch?
Yes. Sleep tracking with snore detection on iPhone works fully without Apple Watch. Snollo's on-device Core ML model analyzes microphone audio in real time — classifying snoring, breathing, coughing, and sleep talking. Apple Watch improves sleep stage accuracy but is not required for snore detection.
Is Snollo free?
Yes. Snollo is free to download from the App Store — no credit card required. The free tier includes nightly snore detection, AI sound classification, sleep stage breakdown via Apple Watch, Apple Health sync, and 7 days of history. Premium ($4.99/month or $29.99/year) adds an extended sound library (50+ sounds), unlimited history, and advanced AI recommendations. Core sleep tracking is always free.
Does Snollo work on iPad?
Snollo is designed for iPhone and Apple Watch. iPad is not a supported platform because the microphone placement on iPad is not optimized for overnight bedside recording, and the app's Apple Watch integration relies on an iPhone being present. For best results, use Snollo on an iPhone 12 or later running iOS 17+.
What happens if I cancel Premium?
If you cancel Snollo Premium, your account reverts to the free tier. Your sleep history, sound recordings from the past 7 days, and all Apple Health data are preserved. You keep access to all core features — nightly snore detection, sleep stage breakdown, and Apple Watch integration — permanently, at no cost. No data is deleted when you cancel.
How does Snollo compare to Apple's built-in Sleep app?
Apple's native Sleep app (in the Health app) tracks time in bed and basic sleep stages via Apple Watch but does not detect or record snoring sounds, does not classify overnight audio events, and does not provide a sleep quality score. Snollo adds snore detection via the iPhone microphone, audio clip playback, sound classification (breathing, coughing, sleep talking), and a detailed sleep quality score — all processed on-device alongside the Apple Watch data that the Health app already collects.

Try it tonight.

Your data stays in your iCloud. Snollo has no servers to send it to — and that's by design.

Download on App Store
★ 5.0 Rating Private by design Apple Watch Sync