# Kraepelin Training vs Kept

The clearest difference is ads: Kept at none against Kraepelin Training's shown. Kraepelin Training's advantage is device support (3 vs 1) and iOS requirement (14.1 vs 16.4). On price, update cadence and in-app purchases there is nothing between them.

Both are free to download. Kraepelin Training sells 1 one-off in-app purchase and Kept sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

Kraepelin Training ships an update every 5 weeks, Kept every 3 weeks. The most recent releases landed on October 4, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Kraepelin Training | Kept |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (20 ratings)](https://appshunter.io/ios/app/kraepelin-training/id1560607060/reviews)** | — |
| Number of ratings | **20** | — |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 29 MB | 94 MB |
| Requires iOS | **14.1** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Takahide Kambe](https://appshunter.io/developer/1502914652) | [TAKASHI WATANABE](https://appshunter.io/developer/6801165170) |

## What reviewers say

### Kraepelin Training

[App page](https://appshunter.io/ios/app/kraepelin-training/id1560607060)

Practice the Kraepelin test, a mental arithmetic exercise. Add adjacent numbers and input the last digit. Features custom operators, test assessment, and a PRO version with handwriting recognition and ad removal.

**Highlights:** Adjacent number addition, Custom operator modes (+, -, x), Test result assessment (S to C ranks), Hand-writing input (PRO), Brain training and calculation practice

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Paid Version | $2.99 | one-time |


### Kept

[App page](https://appshunter.io/ios/app/kept-study-with-me-timer/id6801165168)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kept Pro Monthly: Study Video | $7.99 | per month |
| Kept Pro Yearly: Study Video | $44.99 | per year |


## Frequently asked questions

### Is Kraepelin Training free?

Kraepelin Training is free to download, with in-app purchases available.

### Is Kept free?

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

### Do Kraepelin Training or Kept have ads?

Kraepelin Training shows ads; Kept does not.

### Which is updated more often, Kraepelin Training or Kept?

Kraepelin Training ships an update every 5 weeks, and Kept every 3 weeks. Most recently, Kraepelin Training was updated on October 4, 2026 and Kept on October 18, 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.*