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No Subscription Required

A Free Sleep Tracker That Actually Tracks Sleep

Snore detection, Apple Watch sleep stages, audio playback, Apple Health sync — all on the free tier. No account, no trial-to-paid trap, no ads.

Most "free" sleep apps gate the useful features behind a subscription. Snollo doesn't. Premium is genuinely optional — for an extended sound library and advanced statistics, not for basic sleep tracking.

Download Free — No Trial, No Ads

iPhone · iOS 17+ · Apple Watch optional

What you get on the free tier

Not a teaser. The full sleep tracker, no time limit, no nag screens.

✓ Sleep duration tracking
✓ On-device snore detection
✓ Audio clip playback (snores, breathing, sleep talking)
✓ Apple Watch sleep stages — REM, Deep, Light
✓ Heart rate and SpO₂ from Apple Watch
✓ Apple Health (HealthKit) sync
✓ Basic sleep history
✓ Sleep quality score
✓ Sound timeline with timestamps
✓ iPhone-only mode (no watch needed)

What Premium adds (optional)

If you want extras, Premium is there. Sleep tracking works fully without it.

Extended sound library

White noise, rain, nature, ambient sounds — to help you fall asleep.

Advanced statistics

Sleep debt tracking, weekly trends, monthly comparisons, baseline analysis.

AI-powered recommendations

Personalized sleep tips based on your patterns over time.

Unlimited sleep history

Keep every night indefinitely. Free tier keeps recent history.

Premium pricing varies by region — see the App Store for your local price. No free trial that auto-renews; Premium is a separate purchase.

What's actually free in each sleep app

Which sleep apps put the useful features on the free tier — and which gate them behind subscriptions.

Free sleep tracker app comparison
App Free tier Snore detection Watch stages Audio playback Ads
Snollo ★ Full sleep tracking Free Free Free None
SnoreLab Limited (1 night/wk) Free (basic) Not supported Free (limited) Yes
Sleep Cycle Trial only Premium only Premium only Premium only Yes
Pillow Limited features Premium only Premium only Premium only None
ShutEye Trial only Premium only Premium only Premium only Yes

Based on publicly available App Store listings as of May 2026.

How can a sleep app be this free?

A reasonable question to ask. Most "free" apps recoup costs through advertising or by selling data — and a sleep app, with overnight audio from your bedroom, has uniquely valuable data to sell.

Snollo's free tier is sustainable because the architecture genuinely costs nothing to operate. Audio is processed on-device by Apple's CoreML framework — no server compute. Sleep data is stored in your iCloud — no database costs. There are no servers, no S3 buckets, no Postgres instances, no cloud bills.

The only ongoing costs are the App Store developer program ($99/year), App Store Connect, and the time of the developer. Premium subscriptions cover those plus reinvest into the app. The free tier exists not as a marketing teaser but because the actual unit cost of one free user is essentially zero.

Read more about why on-device matters →

Related

No watch

iPhone-only sleep tracker

Track sleep with just your iPhone — no Apple Watch needed.

Snoring

Snore detection app

Detect, classify, and play back snores from your iPhone overnight.

Watch users

Apple Watch sleep tracking

REM/Deep/Light stages, heart rate, SpO₂ — when you add a watch.

From the Snollo blog

Guide

Snollo vs Sleep Cycle: Which Sleep App Should You Use in 2026?

Comparing Snollo and Sleep Cycle on privacy, features, pricing, and Apple Watch support. Sleep Cycle is the most-downloaded sleep app. Snollo is the most private. Here's what each actually does.

Guide

REM, Deep, and Light Sleep — What Each Stage Does and How to Get More

A 5-minute primer on the four sleep stages. What REM, Deep, and Light sleep each do for your brain and body, how much of each you should get, and how to track them on iPhone or Apple Watch.

Guide

Why You're Still Tired After 8 Hours of Sleep (And How to See What's Actually Happening Tonight)

Eight hours in bed isn't the same as eight hours of restorative sleep. Here are the seven evidence-based reasons you wake up exhausted — and how to collect your own sleep data tonight, privately, without a clinic visit.

Free Sleep Tracking — FAQ

Is there a truly free sleep tracker for iPhone?
Yes. Snollo's core features — sleep duration tracking, snore detection, audio event playback, Apple Watch sleep stages, heart rate, and Apple Health sync — are all on the free tier with no time limit, no account, and no subscription. Premium is an optional upgrade for extras (extended sound library, advanced stats, AI recommendations). The free tier is the full sleep tracker.
Do free sleep tracker apps work as well as paid ones?
It depends what's free. Many 'free' sleep apps gate the actually useful features behind subscriptions — leaving the free version functionally limited. Snollo includes snore detection, sleep stages, and audio playback on the free tier. Same on-device AI, same Apple Watch integration, same private iCloud storage.
Does Snollo show ads on the free tier?
No. Snollo has no advertising on any tier — no banner ads, no interstitials, no ad SDKs, no rewarded video. The free tier is supported by Premium upgrades and nothing else.
Is the free Snollo tier a limited trial that auto-renews?
No. The free tier is permanent. There is no free trial that auto-renews into Premium. Premium is a separate purchase you make explicitly through the App Store subscription flow, only if you want the extra features.
What's the difference between Snollo Free and Snollo Premium?
Free includes sleep duration tracking, on-device snore detection, audio playback, Apple Watch sleep stages, heart rate, SpO₂, Apple Health sync, sleep score, and basic history. Premium adds an extended sound library (white noise, nature, ambient), advanced statistics (sleep debt, weekly/monthly trends), AI-powered recommendations, and unlimited history. Core sleep tracking does not depend on Premium.
Are free sleep tracker apps safe to use?
Most free sleep apps recoup costs through advertising or data sharing — your bedroom audio and sleep data become the product. Snollo is different: no ads, no data brokers, audio processed entirely on-device. The free tier exists because the on-device architecture is genuinely low-cost to operate.

Start tonight — free, no strings

Free download. No account, no trial, no ads. The sleep tracker that doesn't gate the basics.

Download Snollo Free

iPhone iOS 17+ · No account · No ads