# ProbabilityPlayer vs CIT Hub

The clearest difference is in-app purchases: CIT Hub at none against ProbabilityPlayer's 1. CIT Hub also leads on update cadence (every 11 days vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. ProbabilityPlayer sells 1 one-off in-app purchase. CIT Hub asks for nothing beyond the download.

ProbabilityPlayer ships an update monthly, CIT Hub every 11 days. The most recent releases landed on October 13, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | ProbabilityPlayer | CIT Hub |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 11 days** |
| Monetization | Free with in-app purchases | — |
| Size | 9 MB | 5 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Motonari Hibi](https://appshunter.io/developer/386737172) | [Jota Irie](https://appshunter.io/developer/1882598283) |

## What reviewers say

### 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 |


### CIT Hub

[App page](https://appshunter.io/ios/app/cit-hub/id6760315556)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ProbabilityPlayer free?

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

### Is CIT Hub free?

CIT Hub is free to download, with no in-app purchases.

### Do ProbabilityPlayer or CIT Hub have ads?

Neither ProbabilityPlayer nor CIT Hub shows ads.

### Which is updated more often, ProbabilityPlayer or CIT Hub?

ProbabilityPlayer ships an update monthly, and CIT Hub every 11 days. Most recently, ProbabilityPlayer was updated on October 13, 2026 and CIT Hub on October 8, 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.*