# クレペリン：テストマスター vs Electro Math

The clearest difference is price: Electro Math at Free against クレペリン：テストマスター's $0.99. Electro Math also leads on update cadence (daily vs fortnightly) and device support (3 vs 1). クレペリン：テストマスター's advantage is in-app purchases (none vs 1). On ads there is nothing between them.

Electro Math is free to download; クレペリン：テストマスター costs $0.99 up front. Electro Math sells 1 in-app purchase, starting at $2.99 per month. クレペリン：テストマスター asks for nothing beyond the download.

クレペリン：テストマスター ships an update fortnightly, Electro Math daily. The most recent releases landed on September 22, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | クレペリン：テストマスター | Electro Math |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Daily** |
| Size | 0 MB | 44 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Taiyo Koshiba](https://appshunter.io/developer/1687457132) | [ASUKA MINAMOTO](https://appshunter.io/developer/1855336606) |

## What reviewers say

### クレペリン：テストマスター

[App page](https://appshunter.io/ios/app/id6744862345)

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

**In-app purchases:** none


### Electro Math

[App page](https://appshunter.io/ios/app/electro-math/id6755659770)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| サブスクリプション（定期購読） | $2.99 | per month |


## Frequently asked questions

### Is クレペリン：テストマスター free?

クレペリン：テストマスター costs $0.99, with no in-app purchases.

### Is Electro Math free?

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

### Do クレペリン：テストマスター or Electro Math have ads?

Neither クレペリン：テストマスター nor Electro Math shows ads.

### Which is updated more often, クレペリン：テストマスター or Electro Math?

クレペリン：テストマスター ships an update fortnightly, and Electro Math daily. Most recently, クレペリン：テストマスター was updated on September 22, 2026 and Electro Math on September 17, 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.*