# Mastery Timer vs 10,000 Hours Timer

The clearest difference is in-app purchases: 10,000 Hours Timer at none against Mastery Timer's 1. Mastery Timer's advantage is update cadence (every 2 days vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Mastery Timer sells 1 one-off in-app purchase. 10,000 Hours Timer asks for nothing beyond the download.

Mastery Timer ships an update every 2 days, 10,000 Hours Timer every 2 weeks. The most recent releases landed on September 27, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Mastery Timer | 10,000 Hours Timer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 2 weeks |
| Size | 55 MB | 8 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Arjun Gupte](https://appshunter.io/developer/1894098625) | [Natsukiktst Sato](https://appshunter.io/developer/6798323505) |

## What reviewers say

### Mastery Timer

[App page](https://appshunter.io/ios/app/mastery-timer/id6782785941)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Friends | $1.99 | one-time |


### 10,000 Hours Timer

[App page](https://appshunter.io/ios/app/10000-hours-timer/id6804444589)

**In-app purchases:** none


## Frequently asked questions

### Is Mastery Timer free?

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

### Is 10,000 Hours Timer free?

10,000 Hours Timer is free to download, with no in-app purchases.

### Do Mastery Timer or 10,000 Hours Timer have ads?

Neither Mastery Timer nor 10,000 Hours Timer shows ads.

### Which is updated more often, Mastery Timer or 10,000 Hours Timer?

Mastery Timer ships an update every 2 days, and 10,000 Hours Timer every 2 weeks. Most recently, Mastery Timer was updated on September 27, 2026 and 10,000 Hours Timer 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.*