# Derivon - Calculus Practice — Calc Derivatives & Integrals

> Calculus practice app for derivatives and integrals with gamified rewards. (iPhone/iPad app by RYOMA MIZUTANI.)

- Source: https://appshunter.io/ios/app/derivon-calculus-practice/id6761150220 (this page in markdown: same URL + `.md`)
- Developer: [RYOMA MIZUTANI](https://appshunter.io/developer/1736955493)
- Category: Education, Games
- Price: Free with in-app purchases
- Rating: 3.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 26.0 · 112 MB
- Languages: American English, Japanese
- Released: 2026-04-12
- Data updated: 2026-08-13
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/derivon-calculus-practice/id6761150220/reviews.md

## What is Derivon?

Master calculus through daily practice. Solve derivatives and integrals by intuition — no overthinking, just repetition.

  • Swipe through problems and build your skills
  • Earn Star Sand with every correct answer
  • Spin the Gacha to collect planets in your Gallery
  • Build a daily streak — never break the chain
  • Take Rank-Up Challenges as you progress
  • Play Shooting mode for a quick break
  • Track your streak, level up, and earn rewards

  Whether you're preparing for AP Calculus, university exams, or just sharpening your math skills, Derivon makes practice feel like a space adventure.

  3 minutes a day. That's all it takes.

  Terms of Use (EULA):
  https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Key features

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

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

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


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/derivon-calculus-practice/id6761150220/reviews.md

### 3/5 — Good app but can’t change language

*2026-07-02*

The exercise is nice but I’m stuck at using Japanese

**Developer response:** Thanks for playing! Some screens were still in Japanese — fixed in the update coming out now. It'll be fully English soon.

## Frequently asked questions about Derivon

### What is Derivon used for?

Derivon is designed to help users master calculus concepts, specifically derivatives and integrals, through daily practice. It aims to make learning feel like a space adventure with gamified elements.

### How does Derivon help users learn calculus?

It uses a method of intuitive repetition, allowing users to swipe through problems and build skills. The app focuses on short, daily practice sessions, with just 3 minutes a day recommended.

### What are the gamified features in Derivon?

Users can earn 'Star Sand' for correct answers, use it to spin a Gacha for planets to collect in their Gallery, and build a daily streak. There are also Rank-Up Challenges and a 'Shooting' mode for breaks.

### Is Derivon suitable for exam preparation?

Yes, the description mentions it's ideal for preparing for AP Calculus, university exams, or simply sharpening general math skills.

### What is the rating and price of Derivon?

Derivon has a rating of 3.0 stars from 1 rating and is available for free. It does offer in-app purchases.

### Does Derivon have ads?

Yes, Derivon contains advertisements. It is a free app with in-app purchases and advertisements.

### What devices does Derivon support?

Currently, Derivon is supported on iPhone devices. It was released on April 12, 2026, and its latest version is 2.8.7, last updated on July 15, 2026.

### What is the age rating for Derivon?

Derivon has an age rating of 4+, making it suitable for a wide range of young learners and up.

## Version history (last 5 releases)

### 3.0.5 — 2026-08-12

• Bug fixes and improvement

### 3.0.4 — 2026-08-08

• Bug fixes and improvement

### 3.0.3 — 2026-08-01

• Bug fixes and improvement

### 3.0.2 — 2026-07-30

• Bug fixes and improvement

### 3.0.1 — 2026-07-28

• Bug fixes and improvement

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-13.*