# Demon Time vs Mastery Timer

The clearest difference is in-app purchases: Demon Time at none against Mastery Timer's 1. Demon Time also leads on device support (4 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Mastery Timer sells 1 one-off in-app purchase. Demon Time asks for nothing beyond the download.

## The numbers

| Metric | Demon Time | Mastery Timer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 2 days |
| Size | 18 MB | 55 MB |
| Requires iOS | 17.6 | **16.4** |
| Devices | **iPhone, iPad, Apple Watch, Vision Pro** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Sahil Chaddha](https://appshunter.io/developer/1695364563) | [Arjun Gupte](https://appshunter.io/developer/1894098625) |

## What reviewers say

### Demon Time

[App page](https://appshunter.io/ios/app/demon-time/id6762269503)

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Demon Time free?

Demon Time is free to download, with no in-app purchases.

### Is Mastery Timer free?

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

### Do Demon Time or Mastery Timer have ads?

Neither Demon Time nor Mastery Timer shows ads.

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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.*