Good app but can’t change language
The exercise is nice but I’m stuck at using Japanese
Response from developer
Thanks for playing! Some screens were still in Japanese — fixed in the update coming out now. It'll be fully English soon.
Free
In-App PurchasesWith Ads
Details
About
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.
✓Daily calculus problem practice
✓Earn Star Sand rewards
✓Collect planets in Gallery
✓Build and maintain daily streaks
✓Rank-Up Challenges
✓Shooting mode for breaks
Show original description
+2
What's New in Derivon
2.8.7
July 15, 2026
• Bug fixes and improvements
3
In-App Purchases
$0.99
5 Star Fragments
5 Star Fragments.
User reviews
FAQ
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.