# 化学の英単語 でた単（理系の英単語） vs ProbabilityPlayer

The clearest difference is price: ProbabilityPlayer at Free against 化学の英単語 でた単（理系の英単語）'s $6.99. 化学の英単語 でた単（理系の英単語）'s advantage is in-app purchases (none vs 1) and update cadence (every 5 days vs monthly). On review sentiment, ads and device support there is nothing between them.

ProbabilityPlayer is free to download; 化学の英単語 でた単（理系の英単語） costs $6.99 up front. ProbabilityPlayer sells 1 one-off in-app purchase. 化学の英単語 でた単（理系の英単語） asks for nothing beyond the download.

化学の英単語 でた単（理系の英単語） ships an update every 5 days, ProbabilityPlayer monthly. The most recent releases landed on November 11, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | 化学の英単語 でた単（理系の英単語） | ProbabilityPlayer |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Monthly |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 98 MB | 9 MB |
| Requires iOS | **15.4** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Namiko Takahashi](https://appshunter.io/developer/1349212420) | [Motonari Hibi](https://appshunter.io/developer/386737172) |

## What reviewers say

### 化学の英単語 でた単（理系の英単語）

[App page](https://appshunter.io/ios/app/id1440114893)

This app helps students learn scientific and mathematical English vocabulary. It offers various practice modes, including tests, flashcards, and AI-powered Q&A, to improve comprehension for university entrance exams and beyond. It covers chemistry, biology, and mathematics with over 3,500 terms.

**Highlights:** Vocabulary tests, English-to-English definitions, Example sentences, Customizable flashcards, AI-powered Q&A, Typing practice, Progress tracking

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

**In-app purchases:** none


### ProbabilityPlayer

[App page](https://appshunter.io/ios/app/probabilityplayer/id6737689746)

Practice probability problems for the Kyotsu Test, a common Japanese university entrance exam. This app focuses on mathematical probability questions and includes diagrams to aid understanding. It is designed to help students prepare for this specific academic assessment.

**Highlights:** Probability problem practice, Kyotsu Test focus, Mathematical probability, Diagrams included, University entrance exam prep

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $1.99 | one-time |


## Frequently asked questions

### Is 化学の英単語 でた単（理系の英単語） free?

化学の英単語 でた単（理系の英単語） costs $6.99, with no in-app purchases.

### Is ProbabilityPlayer free?

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

### Do 化学の英単語 でた単（理系の英単語） or ProbabilityPlayer have ads?

Neither 化学の英単語 でた単（理系の英単語） nor ProbabilityPlayer shows ads.

### Which is updated more often, 化学の英単語 でた単（理系の英単語） or ProbabilityPlayer?

化学の英単語 でた単（理系の英単語） ships an update every 5 days, and ProbabilityPlayer monthly. Most recently, 化学の英単語 でた単（理系の英単語） was updated on November 11, 2026 and ProbabilityPlayer on November 4, 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.*