Fun! Katakana vs Adder
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fun! Katakana
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.
- Learn to write Katakana
- Interactive tracing exercises
- Encouraging characters
- Full character set unlockable
- Family Sharing compatible
Read full descriptionHide full description
Fun! Katakana is educational game App for kids learning the Japanese alphabet: Katakana. By tracing dashed line, your child learn to write perfect Katakana, all while receiving encouragement from cute characters! There is lots for your kids to do in Fun! Katakana. You'll receive 20 characters for FREE, and you can get the full 46 characters if purchased. *About Family Sharing Please purchase "Fun! Katakana (VPP compatible)", not from the purchase button in this app. *About VPP Compatible Version We also provide Volume Purchase Program (VPP) compatible version as another app for educational institutions and companies. Please visit "Volume Purchase Program" (https://vpp.itunes.apple.com/) and search "Fun! Katakana (VPP compatible)".
Adder
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.
- Interactive addition exercises
- Customizable practice sessions
- Progress tracking
- Distraction-free interface
- Tailored learning experience
Read full descriptionHide full description
Adder is a native iOS app coded in Swift, designed as a personal project to help students master additions effortlessly. With interactive exercises, customizable practice sessions, and progress tracking, Adder creates an engaging learning experience tailored to individual needs. Its sleek, distraction-free interface and responsive design make it a perfect tool for students, parents, and educators seeking to build strong foundational math skills.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Fun! Katakana | Adder |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (18 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 92.6% of reviews | — |
| Number of ratings | 18 — better | 1 |
| Update frequency | Every 3 months | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 75 MB | 0 MB |
| Age rating | 4+ | 4+ |
| Developer | Hajime Nakamura | David Kelen |
In-app purchases
Fun! Katakana
- Full version$2.99
Adder
No in-app purchases
Questions
Is Fun! Katakana free?
Is Adder free?
Which has better reviews, Fun! Katakana or Adder?
Do Fun! Katakana or Adder have ads?
Which is updated more often, Fun! Katakana or Adder?
Other comparisons
