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explained.
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Snollo is a private sleep tracker for iPhone and Apple Watch. On-device AI detects snoring and analyzes sleep stages.

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.

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.

  1. 01

    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.

  2. 02

    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.

  3. 03

    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.

Snollo Sleep Cycle
Audio processed on-device
Always
Cloud
Apple Watch sleep stages
Free
Subscription
Snore detection
Free
Subscription
Audio clip playback
Free
No
Separate account
No — uses Apple ID
Required
Subscription required
Optional
Yes (~$40/yr)

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.

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
Soundscapes

Layer white noise, rain, forests, meditation. Sleep timer included

Sleep statistics with weekly insights, Apple Intelligence recommendations and sleep history
Morning Verdict

A clear read on last night, and what to change tonight

Download on App Store

What Snollo Users Are Saying

★★★★★
"I don't have an Apple Watch, so using just my phone was an important feature I needed, along with on-device or iCloud storage for increased privacy."
B
Bustin284
Jul 12, 2026
★★★★★
"What I appreciate most is the attention to privacy, and being able to use the app without a payment obligation while it already has plenty of features."
F
Floriana58
Sep 3, 2026
★★★★★
"Waking up actually feeling like I get why I slept well (or didn't) is such a nice change. It's given me this quiet little hope about sleeping better."
G
GoodSamaritan7733
Mar 11, 2026

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 clipsSnore timelineListen-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 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.

Heart rate variabilityREM / Deep / LightSpO₂
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."

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.

On-device AIYour own iCloudUses Apple ID
Pricing

Free to start. Premium when you're ready.

Prices shown for your region, fetched from the App Store. Apple handles all billing.

Monthly
$5.99 /month
Save 44% Yearly
$39.99 /year
Start Free on App Store

Cancel anytime in Settings → Apple ID → Subscriptions.

Frequently Asked Questions About Sleep Tracking

Do I need an Apple Watch to use Snollo?
No, Snollo works without an Apple Watch. The iPhone microphone detects snoring, breathing, coughing, and sleep talking, and you still get sleep stages. Without a Watch, sleep stages are derived from the iPhone's microphone and motion sensors, so you must grant both Microphone and Motion & Fitness permissions when the app asks. Without them, stages won't be detected. What you don't get without a Watch: the heart-rate, breathing-rate, and blood-oxygen (SpO2) charts. Those require Apple Watch sensors and Apple Health permission so Snollo can read them. Placement also changes: without a Watch the iPhone must be on the bed near you so the mic can reach you; with a Watch it can stay on the nightstand. All of these are Apple privacy controls. Snollo respects them, so any chart or metric only appears once you grant the matching permission.
Do I need to start tracking each night?
Yes. Snollo does not start on its own. If you don't open the app and tap Start before bed, nothing is recorded: no snore detection, no sleep stages, no audio clips. Once you tap Start, the session runs overnight until you stop it in the morning.
Where should I put my iPhone at night?
If you wear an Apple Watch to bed, the iPhone can stay on the nightstand. The Watch handles motion, heart rate, and breathing. If you don't wear a Watch, place the iPhone on the bed near you, mouthpiece facing you, so the microphone can pick up snoring and breath sounds clearly.
What permissions does Snollo need?
Snollo asks for three iOS permissions, all of which are Apple privacy controls that Snollo fully respects: Microphone (to detect snoring, breathing, coughing, sleep talking; required), Motion & Fitness (to detect sleep stages from iPhone movement when you sleep without an Apple Watch; required for stages in that case), and Apple Health (to read Apple Watch heart rate, HRV, blood oxygen, and breathing rate, and to write your sleep data back to Health; required for the heart-rate, breathing-rate, and SpO2 charts and for Apple Health sync). The matching data only appears in the app if you grant the corresponding permission. If a chart or metric is empty, the most likely cause is a permission that was declined or revoked. Check Settings → Privacy & Security and Settings → Health → Data Access to grant access.
How accurate is the snoring detection?
Snollo classifies audio on your iPhone 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.
Where is my sleep data stored?
Snollo classifies audio on your iPhone. Anything saved (sleep stages, event metadata, the short clips you choose to keep) lives in your own iCloud, under your Apple ID, across the Apple devices you sign into.
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?
Your sleep data is yours. Audio is classified on your iPhone; nothing about classification leaves the device. The saved results (sleep stages, event metadata, and any clips you keep) live in your own iCloud, under your Apple ID. There is no separate Snollo account, and the data syncs across the Apple devices you choose, not anywhere else.
What sleep stages does Snollo detect?
Snollo tracks Light sleep (which Apple labels "Core"), Deep sleep, and REM sleep using data from your Apple Watch heart rate and motion sensors. Each morning you get a full breakdown: how long you spent in each stage and how it compares to your personal baseline.
What's the difference between Snollo free and Premium?
The core app includes AI sound detection, sleep stages, Apple Watch integration, and recent history. No subscription required. Premium adds full history, the complete sound library, and detailed weekly stats.
Does this sleep tracker work without Apple Watch?
Yes, Snollo works without an Apple Watch. The iPhone microphone detects snoring, breathing, coughing, and sleep talking, and you still get sleep stages. Without a Watch, sleep stages are derived from the iPhone's microphone and motion sensors, so you must grant both Microphone and Motion & Fitness permissions when the app asks. Without them, stages won't be detected. What you don't get without a Watch: the heart-rate, breathing-rate, and blood-oxygen (SpO2) charts. Those require Apple Watch sensors and Apple Health permission so Snollo can read them. Placement also changes: without a Watch the iPhone must be on the bed near you so the mic can reach you; with a Watch it can stay on the nightstand. All of these are Apple privacy controls. Snollo respects them, so any chart or metric only appears once you grant the matching permission.
Can Snollo detect snoring without Apple Watch?
Yes. Sleep tracking with snore detection on iPhone works fully without Apple Watch. Snollo's on-device 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 when you wear an Apple Watch (motion-based sleep inference without one), Apple Health sync, and recent history. Premium ($5.99/month or $39.99/year in your region) is an auto-renewable subscription that adds an extended sound library (50+ sounds), unlimited history, and insights powered by Apple Intelligence (where available).
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 suited 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 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.

From the Snollo blog

Sleep Divorce: Ticket to a Breakup or Just Getting a Decent Night's Rest?

31% of US adults sometimes sleep apart from their partner. What AASM and Sleep Foundation data show, same-room alternatives, and what research hasn't settled.

Sleepmaxxing: What the Evidence Actually Says

What does the evidence actually say about sleepmaxxing — mouth taping, magnesium, melatonin, cold rooms? A sourced, no-advice breakdown of what the studies found.

Why Am I Always Tired After 8 Hours of Sleep?

You slept a full 8 hours but Monday still wrecks you. Social jetlag — the weekend-vs-weekday schedule shift — throws off your body clock. Here's the fix.
View all articles

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
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