# Study Focus Timer vs 化学マスター

The clearest difference is in-app purchases: 化学マスター at none against Study Focus Timer's 1. 化学マスター also leads on ads (none vs shown) and update cadence (every 4 days vs fortnightly). Study Focus Timer's advantage is iOS requirement (11.0 vs 18.0). On price and device support there is nothing between them.

Both are free to download. Study Focus Timer sells 1 in-app purchase, starting at $0.99 per month. 化学マスター asks for nothing beyond the download.

Study Focus Timer ships an update fortnightly, 化学マスター every 4 days. The most recent releases landed on October 12, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Study Focus Timer | 化学マスター |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 44 MB | 11 MB |
| Requires iOS | **11.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Foodmenu.world Inc.](https://appshunter.io/developer/1438351063) | [ryo otsuka](https://appshunter.io/developer/6788628020) |

## What reviewers say

### Study Focus Timer

[App page](https://appshunter.io/ios/app/study-focus-timer/id1626979957)

This app helps you stay focused during study sessions using customizable timers. It supports the Pomodoro technique and allows for easy arrangement and visual tracking of your work and break intervals. Optimize your learning with flexible timer combinations.

**Highlights:** Pomodoro study timer, Successive timer settings, Interval timer customization, Easy timer rearrangement, Visual elapsed time gauge, List of current study sets

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $0.99 | per month |


### 化学マスター

[App page](https://appshunter.io/ios/app/id6788745347)

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

**In-app purchases:** none


## Frequently asked questions

### Is Study Focus Timer free?

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

### Is 化学マスター free?

化学マスター is free to download, with no in-app purchases.

### Do Study Focus Timer or 化学マスター have ads?

Study Focus Timer shows ads; 化学マスター does not.

### Which is updated more often, Study Focus Timer or 化学マスター?

Study Focus Timer ships an update fortnightly, and 化学マスター every 4 days. Most recently, Study Focus Timer was updated on October 12, 2026 and 化学マスター on October 1, 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.*