# TacticalStudy vs 記憶KEEPER

The clearest difference is iOS requirement: 記憶KEEPER at 15.0 against TacticalStudy's 17.6. On price, update cadence, ads 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.

Both ship on a similar rhythm, roughly every 3 days. The most recent releases landed on September 10, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | TacticalStudy | 記憶KEEPER |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 days | Every 3 days |
| Size | 6 MB | 4 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yutaka Mochida](https://appshunter.io/developer/1868628237) | [nao watanabe](https://appshunter.io/developer/1896686911) |

## What reviewers say

### TacticalStudy

[App page](https://appshunter.io/ios/app/tacticalstudy/id6757744235)

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

**In-app purchases:** none


### 記憶KEEPER

[App page](https://appshunter.io/ios/app/keeper/id6769772312)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TacticalStudy free?

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

### Is 記憶KEEPER free?

記憶KEEPER is free to download, with no in-app purchases.

### Do TacticalStudy or 記憶KEEPER have ads?

Neither TacticalStudy nor 記憶KEEPER shows ads.

### Which is updated more often, TacticalStudy or 記憶KEEPER?

TacticalStudy ships an update every 3 days, and 記憶KEEPER every 3 days. Most recently, TacticalStudy was updated on September 10, 2026 and 記憶KEEPER on September 20, 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.*