# 日本史マスター vs Study Countdown

The clearest difference is ads: 日本史マスター at none against Study Countdown's shown. 日本史マスター also leads on device support (3 vs 1) and iOS requirement (15.0 vs 18.0). On price, update cadence and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

日本史マスター ships an update every 11 days, Study Countdown every 8 days. The most recent releases landed on October 9, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | 日本史マスター | Study Countdown |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 11 days | **Every 8 days** |
| Size | 9 MB | 14 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [ma zhe](https://appshunter.io/developer/1037212370) | [kaisei watanabe](https://appshunter.io/developer/1543587757) |

## What reviewers say

### 日本史マスター

[App page](https://appshunter.io/ios/app/id6761674842)

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

**In-app purchases:** none


### Study Countdown

[App page](https://appshunter.io/ios/app/study-countdown-focus-log/id6765840155)

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

**In-app purchases:** none


## Frequently asked questions

### Is 日本史マスター free?

日本史マスター is free to download, with no in-app purchases.

### Is Study Countdown free?

Study Countdown is free to download, with no in-app purchases.

### Do 日本史マスター or Study Countdown have ads?

Study Countdown shows ads; 日本史マスター does not.

### Which is updated more often, 日本史マスター or Study Countdown?

日本史マスター ships an update every 11 days, and Study Countdown every 8 days. Most recently, 日本史マスター was updated on October 9, 2026 and Study Countdown on October 7, 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.*