# Learn ABC vs Katachi

The clearest difference is in-app purchases: Learn ABC at none against Katachi's 1. Learn ABC also leads on device support (3 vs 1) and iOS requirement (15.6 vs 17.0). Katachi's advantage is update cadence (monthly vs every 20 months). On price and ads there is nothing between them.

Both are free to download. Katachi sells 1 one-off in-app purchase. Learn ABC asks for nothing beyond the download.

Learn ABC ships an update every 20 months, Katachi monthly. The most recent releases landed on September 19, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Learn ABC | Katachi |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 20 months | **Monthly** |
| Size | 290 MB | 6 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Primosoft Inc](https://appshunter.io/developer/638687289) | [atsuko imai](https://appshunter.io/developer/1830783417) |

## What reviewers say

### Learn ABC

[App page](https://appshunter.io/ios/app/learn-abc-3d/id1437632875)

**Features:** Vision Pro support

**In-app purchases:** none


### Katachi

[App page](https://appshunter.io/ios/app/katachi-shape-reflex-puzzle/id6760748598)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is Learn ABC free?

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

### Is Katachi free?

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

### Do Learn ABC or Katachi have ads?

Both Learn ABC and Katachi show ads.

### Which is updated more often, Learn ABC or Katachi?

Learn ABC ships an update every 20 months, and Katachi monthly. Most recently, Learn ABC was updated on September 19, 2026 and Katachi on October 10, 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.*