# Fun! Katakana vs Adder

The clearest difference is in-app purchases: Adder at none against Fun! Katakana's 1. Adder also leads on update cadence (weekly vs every 3 months) and rating (5.0 vs 4.8). Fun! Katakana's advantage is ratings volume (18 vs 1) and iOS requirement (12.0 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. Fun! Katakana sells 1 one-off in-app purchase. Adder asks for nothing beyond the download.

Adder holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Fun! Katakana has 18 ratings behind it against 1, so its average is the more settled of the two.

Fun! Katakana ships an update every 3 months, Adder weekly. The most recent releases landed on November 6, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Fun! Katakana | Adder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (18 ratings)](https://appshunter.io/ios/app/fun-katakana/id1409167644/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/adder-by-mather/id6742083110/reviews)** |
| Number of ratings | **18** | 1 |
| Positive reviews | 92.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 75 MB | 0 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hajime Nakamura](https://appshunter.io/developer/1765813920) | [David Kelen](https://appshunter.io/developer/1796712157) |

## What reviewers say

### Fun! Katakana

[App page](https://appshunter.io/ios/app/fun-katakana/id1409167644)

This educational game helps children learn to write Japanese Katakana characters through interactive tracing exercises. Encouraging characters guide them as they practice, with a portion of the alphabet available for free and the full set unlockable via purchase.

**Highlights:** Learn to write Katakana, Interactive tracing exercises, Encouraging characters, Full character set unlockable, Family Sharing compatible

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full version | $2.99 | one-time |


### Adder

[App page](https://appshunter.io/ios/app/adder-by-mather/id6742083110)

This app offers interactive exercises and customizable practice sessions to help students master addition. It features progress tracking and a distraction-free interface, making it ideal for building foundational math skills.

**Highlights:** Interactive addition exercises, Customizable practice sessions, Progress tracking, Distraction-free interface, Tailored learning experience

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Fun! Katakana free?

Fun! Katakana is free to download, with in-app purchases available.

### Is Adder free?

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

### Which has better reviews, Fun! Katakana or Adder?

Adder is rated higher. Fun! Katakana averages 4.8 out of 5 from 18 ratings, while Adder averages 5.0 from 1 ratings.

### Do Fun! Katakana or Adder have ads?

Neither Fun! Katakana nor Adder shows ads.

### Which is updated more often, Fun! Katakana or Adder?

Fun! Katakana ships an update every 3 months, and Adder weekly. Most recently, Fun! Katakana was updated on November 6, 2026 and Adder on October 30, 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.*