# Katakana Memory Hint [Idn] vs Act Study

The clearest difference is in-app purchases: Katakana Memory Hint [Idn] at none against Act Study's 1. Katakana Memory Hint [Idn] also leads on iOS requirement (8.0 vs 15.2). Act Study's advantage is update cadence (monthly vs every 5 months). On price, ads and device support there is nothing between them.

Both are free to download. Act Study sells 1 one-off in-app purchase. Katakana Memory Hint [Idn] asks for nothing beyond the download.

Katakana Memory Hint [Idn] ships an update every 5 months, Act Study monthly. The most recent releases landed on October 19, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Katakana Memory Hint [Idn] | Act Study |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Monthly** |
| Size | 23 MB | 104 MB |
| Requires iOS | **8.0** | 15.2 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [The Japan Foundation Japanese-Language Institute, Kansai](https://appshunter.io/developer/1023654861) | [ANYONE INC.](https://appshunter.io/developer/1577319263) |

## What reviewers say

### Katakana Memory Hint [Idn]

[App page](https://appshunter.io/ios/app/katakana-memory-hint-idn/id1037727111)

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

**In-app purchases:** none


### Act Study

[App page](https://appshunter.io/ios/app/act-study/id6469045101)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| IQ TEST | Free | one-time |


## Frequently asked questions

### Is Katakana Memory Hint [Idn] free?

Katakana Memory Hint [Idn] is free to download, with no in-app purchases.

### Is Act Study free?

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

### Do Katakana Memory Hint [Idn] or Act Study have ads?

Neither Katakana Memory Hint [Idn] nor Act Study shows ads.

### Which is updated more often, Katakana Memory Hint [Idn] or Act Study?

Katakana Memory Hint [Idn] ships an update every 5 months, and Act Study monthly. Most recently, Katakana Memory Hint [Idn] was updated on October 19, 2026 and Act Study on October 8, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*