Comparison

onSleep vs Sleepsyn

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

onSleep

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Sleep tracking made simple. onSleep is a calm, focused sleep tracker that helps you build consistent sleep habits. Set your goals, tap to start a session, and wake up to see how you slept. No complicated setup. Just a few taps and you are tracking tonight. Build better sleep habits +++ +++ +++ +++ +++ +++ Getting enough quality sleep supports energy, focus, mood, and overall wellbeing. onSleep helps you stay consistent by making sleep tracking easy, visible, and gentle. Whether you are adjusting your schedule, working late, or recovering from jet lag, onSleep keeps your routine on track. Key features +++ +++ +++ +++ +++ +++ onSleep includes everything you need for simple and effective sleep tracking: • One-tap sleep and nap session logging • Animated sleep score circle, color-coded by quality • Sleep rings dashboard showing total sleep, score, deep sleep, and consistency • Sleep stage chart with light, deep, REM, and awake breakdown • Sleep debt tracker to see how far ahead or behind you are • Calendar heatmap of your sleep history • Smart bedtime and morning reminders • Sleep coach messages with personalized tips • Quality rating from 1 to 5 stars with optional notes • Apple Health and Health Connect sync for automatic imports • Weekly and monthly trend charts • Consistency gauge and pattern detection • CSV and JSON data export • Custom sleep goals and bedtime schedule Why onSleep? +++ +++ +++ +++ +++ +++ Sleep tools can feel overwhelming when they track too many things at once. onSleep was built with focus on what matters most: helping you sleep better consistently. Nothing else. No clutter. No guilt. Just friendly nudges and clear data. When to use onSleep +++ +++ +++ +++ +++ +++ • When you want to build a regular bedtime routine • When you are curious how much deep sleep you actually get • When you want gentle reminders without annoying alarms • When you need to track sleep debt after a busy week • When you want a single view of your naps and night sleep together Simple by design +++ +++ +++ +++ +++ +++ onSleep is built with a clean, minimal approach so you can focus on rest, not on navigating complicated menus. Tap the moon to start. Tap again when you wake up. Rate your quality and move on with your day. Start sleeping better tonight with onSleep. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Sleepsyn

This app tracks your sleep patterns, explains their impact on your well-being, and offers tools to help you fall asleep faster. It provides personalized insights into your chronotype and habits, with premium features for deeper analysis and a full sound library.

Highlights
  • Sleep tracking without wearables
  • Habit logging and correlation
  • Chronotype identification quiz
  • Guided breathing exercises
  • Variety of sleep sounds
  • Weekly and monthly progress reports
Features
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Most sleep apps show you a graph and leave you to figure out the rest. Sleepsyn is different. It tracks your sleep, explains what is happening, and guides you toward better nights without pressure, without guilt, and without making it feel like a chore. TRACK YOUR SLEEP Wear your Apple Watch to bed, and Sleepsyn syncs your sleep automatically. Don't have a Watch? Just log last night's sleep yourself in seconds. Tell Sleepsyn when you went to sleep, when you woke up, and rate your sleep. No complicated setup either way. The app does the rest. UNDERSTAND WHAT AFFECTS YOU Log your habits with the sleep log. Caffeine, alcohol, exercise, screen time, and stress. Over time, Sleepsyn connects the dots and lets you know how they are affecting your sleep. These are not guesses. They are your patterns, surfaced from your own data. KNOW YOUR CHRONOTYPE Take our quick 5-question quiz and discover whether you are an Early Bird, a Flexible Sleeper, or a Night Owl. Your chronotype shapes everything. Your ideal bedtime, your peak energy hours, and why fighting your natural rhythm always backfires. WIND DOWN BEFORE BED Fall asleep faster with tools designed around how your nervous system actually works. • 4-7-8 breathing — a science-backed technique that calms your nervous system in 76 seconds • Sleep sounds — rain, white noise, brown noise, ocean waves, fan, and more SEE YOUR PROGRESS Every Monday, get a beautifully designed weekly sleep card showing your average sleep, your best night, and how many times you hit your goal. On the first of every month, a full monthly report captures your bigger picture. Both are designed to be shared. Because good sleep is worth talking about. SLEEPSYN PREMIUM Want to go deeper? Premium unlocks your full sleep history, the AI sleep coach chat, habit correlation insights, sleep debt tracker, complete sounds library, and your monthly report card. Start with a 7-day free trial. No commitment. Sleepsyn is ad-free. Your sleep data is private, encrypted, and never sold. You can delete your account and all your data at any time. Sleep is not complicated. You just need something that helps you understand yours. SleepSyn Privacy Policy: https://sleepsynapp.netlify.app/sleepsyn_privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

onSleep4 screens
Sleepsyn4 screens

Verdict

The call

The clearest difference is update cadence: Sleepsyn at every 4 days against onSleep's monthly. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. onSleep sells 2 in-app purchases, starting at $3.99 per month and Sleepsyn sells 2 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

onSleep ships an update monthly, Sleepsyn every 4 days. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.

Scorecard1 real difference · 9 level
onSleep versus Sleepsyn: the parameters behind the verdict, then further details
ParameteronSleepSleepsyn
PriceFreeFree
Rating—5.0 (3 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—3 — better
Update frequencyMonthlyEvery 4 days — better
AdsNoNo
In-app purchasesYesYes
Monetization—Freemium
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.115.0 — better
Further details — not scored
Size73 MB55 MB
Age rating4+4+
DeveloperappsixKashif Umar

In-app purchases

2 purchases

onSleep

Subscriptions2
  • onSleep Pro Monthly Plan$3.991 Month
  • onSleep Pro Yearly Plan3 Days trial$29.991 Year
2 purchases

Sleepsyn

Subscriptions2
  • Monthly7 Days trial$6.991 Month
  • Semi-Annual7 Days trial$34.996 Months

Questions

Is onSleep free?
onSleep is free to download, with in-app purchases available.
Is Sleepsyn free?
Sleepsyn is free to download, with in-app purchases available.
Do onSleep or Sleepsyn have ads?
Neither onSleep nor Sleepsyn shows ads.
Which is updated more often, onSleep or Sleepsyn?
onSleep ships an update monthly, and Sleepsyn every 4 days. Most recently, onSleep was updated on November 9, 2026 and Sleepsyn on October 31, 2026.

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