# UnitTracking~帝京大学の単位管理アプリ~ vs ProbabilityPlayer

The clearest difference is in-app purchases: UnitTracking~帝京大学の単位管理アプリ~ at none against ProbabilityPlayer's 1. UnitTracking~帝京大学の単位管理アプリ~ also leads on iOS requirement (11.0 vs 18.0). ProbabilityPlayer's advantage is ads (none vs shown). On price, update cadence and device support there is nothing between them.

Both are free to download. ProbabilityPlayer sells 1 one-off in-app purchase. UnitTracking~帝京大学の単位管理アプリ~ asks for nothing beyond the download.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 5, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | UnitTracking~帝京大学の単位管理アプリ~ | ProbabilityPlayer |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | Monthly |
| Monetization | — | Free with in-app purchases |
| Size | 57 MB | 9 MB |
| Requires iOS | **11.0** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hibiki Tamaki](https://appshunter.io/developer/1615779565) | [Motonari Hibi](https://appshunter.io/developer/386737172) |

## What reviewers say

### UnitTracking~帝京大学の単位管理アプリ~

[App page](https://appshunter.io/ios/app/unittracking/id1615779563)

**Features:** macOS Compatibility

**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 UnitTracking~帝京大学の単位管理アプリ~ free?

UnitTracking~帝京大学の単位管理アプリ~ is free to download, with no in-app purchases.

### Is ProbabilityPlayer free?

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

### Do UnitTracking~帝京大学の単位管理アプリ~ or ProbabilityPlayer have ads?

UnitTracking~帝京大学の単位管理アプリ~ shows ads; ProbabilityPlayer does not.

### Which is updated more often, UnitTracking~帝京大学の単位管理アプリ~ or ProbabilityPlayer?

UnitTracking~帝京大学の単位管理アプリ~ ships an update monthly, and ProbabilityPlayer monthly. Most recently, UnitTracking~帝京大学の単位管理アプリ~ was updated on October 5, 2026 and ProbabilityPlayer on September 27, 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.*