Comparison

Sleepsyn vs OneDayy

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

Head to head
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
Read full description

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/

About

OneDayy

Read full description

OneDayy is your personal reflection companion. Add one memory a day — a photo, a few words, or both. OneDayy quietly turns those moments into meaningful insights about your habits, wellbeing, relationships, milestones, and the story you're writing every year HOW IT WORKS: Tap + to add today's memory. Write a few thoughts, pick a photo, or let OneDayy's AI help you put words to the moment. OneDayy analyzes your entries and automatically identifies: - Habits and streaks - Mood and wellbeing over time - Life areas receiving the most attention - People who appear most in your memories - Milestones and achievements - Places you have visited VISUALIZATIONS: Your life becomes beautiful, interactive visualizations: - Year View: see every day of the year as a dot. Watch your year fill up. - Mood View: your emotional patterns over time - Life Areas: where your energy is actually going - Connections: who matters most in your story - Milestones: your proudest moments, surfaced automatically - Travel: every place your memories have taken you PRIVATE BY DESIGN: Everything is stored on your device. Enable Face ID to add an extra layer of privacy. OneDayy locks automatically every time you leave the app. AI THAT STAYS IN THE BACKGROUND: OneDayy uses AI to help you write entries and surface insights. It works quietly in the background. Your personal data is never used to train public AI models. You do not need to write every day. OneDayy works whether you capture one memory a week or every single day. Set gentle reminders at your preferred time, and let your story unfold at your own pace. Start today. One day at a time.

Screenshots

Sleepsyn4 screens
OneDayy4 screens

Verdict

The call

The clearest difference is in-app purchases: OneDayy at none against Sleepsyn's 2. On price, ads, device support and iOS requirement 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. Sleepsyn sells 2 in-app purchases, starting at $6.99 per month. OneDayy asks for nothing beyond the download.

Scorecard1 real difference · 9 level
Sleepsyn versus OneDayy: the parameters behind the verdict, then further details
ParameterSleepsynOneDayy
PriceFreeFree
Rating5.0 (3 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 4 days—
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium—
DevicesiPhone, iPodiPhone, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size55 MB33 MB
Age rating4+4+
DeveloperKashif UmarSarmad Mustafa

In-app purchases

2 purchases

Sleepsyn

Subscriptions2
  • Monthly7 Days trial$6.991 Month
  • Semi-Annual7 Days trial$34.996 Months
None

OneDayy

No in-app purchases

Questions

Is Sleepsyn free?
Sleepsyn is free to download, with in-app purchases available.
Is OneDayy free?
OneDayy is free to download, with no in-app purchases.
Do Sleepsyn or OneDayy have ads?
Neither Sleepsyn nor OneDayy shows ads.

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