# Sleep Lock vs Simple Fasting

The clearest difference is update cadence: Simple Fasting at weekly against Sleep Lock's every 2 months. Simple Fasting also leads on iOS requirement (17.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Sleep Lock sells 3 in-app purchases, starting at $3.99 per 7 days and Simple Fasting sells 2 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Sleep Lock ships an update every 2 months, Simple Fasting weekly. Both last shipped on October 13, 2026.

## The numbers

| Metric | Sleep Lock | Simple Fasting |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Size | 19 MB | 72 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Modestas Razanauskas](https://appshunter.io/developer/1896518602) | [Oleksandr Kryzhanovskyi](https://appshunter.io/developer/1755912450) |

## What reviewers say

### Sleep Lock

[App page](https://appshunter.io/ios/app/sleep-lock-bedtime-blocker/id6767901934)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sleep Lock Pro – Weekly | $3.99 | per 7 days |
| Sleep Lock Pro – Monthly | $9.99 | per month |
| Sleep Lock Pro – Yearly | $79.99 | per year |


### Simple Fasting

[App page](https://appshunter.io/ios/app/simple-fasting-flexible-timer/id6789996869)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $4.99 | per 7 days |
| Premium Yearly | $19.99 | per year |


## Frequently asked questions

### Is Sleep Lock free?

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

### Is Simple Fasting free?

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

### Do Sleep Lock or Simple Fasting have ads?

Neither Sleep Lock nor Simple Fasting shows ads.

### Which is updated more often, Sleep Lock or Simple Fasting?

Sleep Lock ships an update every 2 months, and Simple Fasting weekly. Most recently, Sleep Lock was updated on October 13, 2026 and Simple Fasting on October 13, 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.*