# 統計検定アプリ 4級 vs Derivon

The clearest difference is price: Derivon at Free against 統計検定アプリ 4級's $6.99. Derivon also leads on update cadence (every 5 days vs every 3 months). 統計検定アプリ 4級's advantage is in-app purchases (none vs 5) and ads (none vs shown).

Derivon is free to download; 統計検定アプリ 4級 costs $6.99 up front. Derivon sells 5 in-app purchases, starting at $1.99 per month. 統計検定アプリ 4級 asks for nothing beyond the download.

統計検定アプリ 4級 ships an update every 3 months, Derivon every 5 days. The most recent releases landed on November 12, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | 統計検定アプリ 4級 | Derivon |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| Rating | — | **[3.0 (1 ratings)](https://appshunter.io/ios/app/derivon-calculus-practice/id6761150220/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 5 days** |
| Monetization | — | Free with in-app purchases |
| Size | 82 MB | 251 MB |
| Requires iOS | **11.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [SKILLUP NeXt, Ltd.](https://appshunter.io/developer/1569771970) | [ABT合同会社](https://appshunter.io/developer/6813846553) |

## What reviewers say

### 統計検定アプリ 4級

[App page](https://appshunter.io/ios/app/4/id1663583821)

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

**In-app purchases:** none


### Derivon

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

Master calculus with daily practice, solving derivatives and integrals through repetition. Earn rewards, collect planets, and build streaks. Designed for AP Calculus, university exams, or general math skill enhancement, it makes practice feel like a space adventure in just 3 minutes a day.

**Highlights:** Daily calculus problem practice, Solve derivatives and integrals, Gamified rewards system (Star Sand, planets), Daily streak building, Rank-Up Challenges, Shooting mode for breaks, Progress tracking and leveling up

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Derivon Super (Monthly) | $1.99 | per month |
| Derivon Super (Yearly) | $14.99 | per year |
| 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 統計検定アプリ 4級 free?

統計検定アプリ 4級 costs $6.99, with no in-app purchases.

### Is Derivon free?

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

### Do 統計検定アプリ 4級 or Derivon have ads?

Derivon shows ads; 統計検定アプリ 4級 does not.

### Which is updated more often, 統計検定アプリ 4級 or Derivon?

統計検定アプリ 4級 ships an update every 3 months, and Derivon every 5 days. Most recently, 統計検定アプリ 4級 was updated on November 12, 2026 and Derivon on November 9, 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.*