# 点字学習Lite vs Derivon

The clearest difference is review sentiment: 点字学習Lite at 38% against Derivon's 0%. 点字学習Lite also leads on in-app purchases (none vs 3) and iOS requirement (11.0 vs 26.0). Derivon's advantage is update cadence (every 2 days vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. Derivon sells 3 one-off in-app purchases. 点字学習Lite asks for nothing beyond the download.

点字学習Lite ships an update every 3 months, Derivon every 2 days. The most recent releases landed on September 18, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | 点字学習Lite | Derivon |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (1 ratings)](https://appshunter.io/ios/app/derivon-calculus-practice/id6761150220/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | **37.5% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Every 2 days** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 13 MB | 130 MB |
| Requires iOS | **11.0** | 26.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Takuya Kawakami](https://appshunter.io/developer/721449462) | [RYOMA MIZUTANI](https://appshunter.io/developer/1736955493) |

## What reviewers say

### 点字学習Lite

[App page](https://appshunter.io/ios/app/lite/id730188318)

Learn braille characters for Japanese kana, numbers, and special sounds. Features include audio playback and randomized quizzes to test your knowledge. Designed for educational purposes.

**Highlights:** Learn kana braille, Learn numbers braille, Learn special sound braille, Audio playback, Randomized quizzes

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

**In-app purchases:** none


### Derivon

[App page](https://appshunter.io/ios/app/derivon-calculus-practice/id6761150220)

Master calculus concepts like derivatives and integrals through daily, intuitive practice. Earn rewards, collect planets, and build streaks as you progress through challenges. Designed for quick, effective learning sessions.

**Highlights:** Daily calculus problem practice, Earn Star Sand rewards, Collect planets in Gallery, Build and maintain daily streaks, Rank-Up Challenges, Shooting mode for breaks

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 5 Star Fragments | $0.99 | one-time |
| 12 Star Fragments | $1.99 | one-time |
| 32 Star Fragments | $3.99 | one-time |


## Frequently asked questions

### Is 点字学習Lite free?

点字学習Lite is free to download, with no in-app purchases.

### Is Derivon free?

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

### Do 点字学習Lite or Derivon have ads?

Both 点字学習Lite and Derivon show ads.

### Which is updated more often, 点字学習Lite or Derivon?

点字学習Lite ships an update every 3 months, and Derivon every 2 days. Most recently, 点字学習Lite was updated on September 18, 2026 and Derivon on September 19, 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.*