# ZenFast vs SleepLock

The clearest difference is device support: ZenFast at 3 against SleepLock's 1. ZenFast also leads on iOS requirement (15.1 vs 18.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. ZenFast sells 2 in-app purchases, starting at $0.99 per month and SleepLock sells 4 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | ZenFast | SleepLock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/sleeplock-bedtime-enforcer/id6761796877/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | — | Every 6 weeks |
| Monetization | — | Freemium |
| Size | 23 MB | 66 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Beibi Technology Co., Ltd.](https://appshunter.io/developer/1721179393) | [Rob Goldstein](https://appshunter.io/developer/951886331) |

## What reviewers say

### ZenFast

[App page](https://appshunter.io/ios/app/zenfast-fasting-tracker/id6743153648)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Access (1 month) | $0.99 | per month |
| All Access (lifetime) | $4.99 | one-time |


### SleepLock

[App page](https://appshunter.io/ios/app/sleeplock-bedtime-enforcer/id6761796877)

This app helps you establish consistent bedtimes by turning the process into a game. It focuses on getting you to bed on time each night, allowing you to track your progress and build healthy sleep habits.

**Highlights:** Consistent bedtime enforcement, Build sleep streaks, Log sleep and rate energy, Advanced sleep analytics (Pro), Gamification with XP and badges (Pro), Local data storage for privacy

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SleepLock Pro Weekly | $4.99 | per 7 days |
| SleepLock Pro Monthly | $9.99 | per month |
| SleepLock Pro Yearly | $49.99 | per year |
| SleepLock Pro Lifetime | $79.99 | one-time |


## Frequently asked questions

### Is ZenFast free?

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

### Is SleepLock free?

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

### Do ZenFast or SleepLock have ads?

Neither ZenFast nor SleepLock shows ads.

---

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