# Jottable Flash Cards vs Derivon

The clearest difference is review sentiment: Jottable Flash Cards at 55% against Derivon's 0%. Jottable Flash Cards also leads on in-app purchases (none vs 3) and ads (none vs shown). Derivon's advantage is price (Free vs $0.99) and update cadence (every 2 days vs every 5 months). On device support there is nothing between them.

Derivon is free to download; Jottable Flash Cards costs $0.99 up front. Derivon sells 3 one-off in-app purchases. Jottable Flash Cards asks for nothing beyond the download.

Jottable Flash Cards ships an update every 5 months, Derivon every 2 days. The most recent releases landed on August 15, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Jottable Flash Cards | Derivon |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[3.0 (1 ratings)](https://appshunter.io/ios/app/derivon-calculus-practice/id6761150220/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | **55.0% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 2 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 4 MB | 130 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Satoshi Horiguchi](https://appshunter.io/developer/310504293) | [RYOMA MIZUTANI](https://appshunter.io/developer/1736955493) |

## What reviewers say

### Jottable Flash Cards

[App page](https://appshunter.io/ios/app/jottable-flash-cards/id434517635)

Create and study custom flashcards with advanced features like multiple memos per card, automatic flipping, and import/export options. Organize your study materials efficiently with this versatile educational tool.

**Highlights:** Customizable flashcards with multiple memos, Automatic card flipping, Import/export text files, Search and reorder cards, Hide cards by dragging, Supports Retina displays

**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 Jottable Flash Cards free?

Jottable Flash Cards costs $0.99, with no in-app purchases.

### Is Derivon free?

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

### Do Jottable Flash Cards or Derivon have ads?

Derivon shows ads; Jottable Flash Cards does not.

### Which is updated more often, Jottable Flash Cards or Derivon?

Jottable Flash Cards ships an update every 5 months, and Derivon every 2 days. Most recently, Jottable Flash Cards was updated on August 15, 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.*