# onSleep vs Sleepsyn

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.

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.

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

## The numbers

| Metric | onSleep | Sleepsyn |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/sleepsyn-sleep-score-tracker/id6777352590/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 days** |
| Monetization | — | Freemium |
| Size | 73 MB | 55 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [appsix](https://appshunter.io/developer/1867625178) | [Kashif Umar](https://appshunter.io/developer/1896599118) |

## What reviewers say

### onSleep

[App page](https://appshunter.io/ios/app/onsleep-sleep-tracker-and-diary/id6757688486)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| onSleep Pro Monthly Plan | $3.99 | per month |
| onSleep Pro Yearly Plan | $29.99 | per year |


### Sleepsyn

[App page](https://appshunter.io/ios/app/sleepsyn-sleep-score-tracker/id6777352590)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $6.99 | per month |
| Semi-Annual | $34.99 | per 6 months |


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*