# DotSleep vs Fasting Window

The clearest difference is in-app purchases: Fasting Window at none against DotSleep's 3. Fasting Window also leads on iOS requirement (13.0 vs 17.0). DotSleep's advantage is update cadence (fortnightly vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. DotSleep sells 3 in-app purchases, starting at $2.99 per month. Fasting Window asks for nothing beyond the download.

DotSleep ships an update fortnightly, Fasting Window every 2 months. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | DotSleep | Fasting Window |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Size | 93 MB | 21 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [建达 刁](https://appshunter.io/developer/1895938303) | [HeungYeol Kim](https://appshunter.io/developer/1878087341) |

## What reviewers say

### DotSleep

[App page](https://appshunter.io/ios/app/dotsleep-sleep-debt-log/id6764863862)

**Features:** Apple Watch app

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DotSleep Premium (Monthly) | $2.99 | per month |
| DotSleep Premium (Yearly) | $14.99 | per year |
| DotSleep Premium (Lifetime) | $24.99 | one-time |


### Fasting Window

[App page](https://appshunter.io/ios/app/fasting-window-if-timer/id6774622599)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is DotSleep free?

DotSleep is free to download, with in-app purchases available.

### Is Fasting Window free?

Fasting Window is free to download, with no in-app purchases.

### Do DotSleep or Fasting Window have ads?

Neither DotSleep nor Fasting Window shows ads.

### Which is updated more often, DotSleep or Fasting Window?

DotSleep ships an update fortnightly, and Fasting Window every 2 months. Most recently, DotSleep was updated on October 25, 2026 and Fasting Window on October 31, 2026.

---

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