# ProbabilityPlayer vs ベクトル

The clearest difference is price: ProbabilityPlayer at Free against ベクトル's $1.99. ベクトル's advantage is in-app purchases (none vs 1) and update cadence (every 5 days vs monthly). On ads, device support and iOS requirement there is nothing between them.

ProbabilityPlayer is free to download; ベクトル costs $1.99 up front. ProbabilityPlayer sells 1 one-off in-app purchase. ベクトル asks for nothing beyond the download.

ProbabilityPlayer ships an update monthly, ベクトル every 5 days. The most recent releases landed on September 27, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | ProbabilityPlayer | ベクトル |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 9 MB | 36 MB |
| Requires iOS | 18.0 | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Motonari Hibi](https://appshunter.io/developer/386737172) | [Akira Hiraoka](https://appshunter.io/developer/1668714727) |

## 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 |


### ベクトル

[App page](https://appshunter.io/ios/app/id6797364257)

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

**In-app purchases:** none


## Frequently asked questions

### Is ProbabilityPlayer free?

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

### Is ベクトル free?

ベクトル costs $1.99, with no in-app purchases.

### Do ProbabilityPlayer or ベクトル have ads?

Neither ProbabilityPlayer nor ベクトル shows ads.

### Which is updated more often, ProbabilityPlayer or ベクトル?

ProbabilityPlayer ships an update monthly, and ベクトル every 5 days. Most recently, ProbabilityPlayer was updated on September 27, 2026 and ベクトル on September 22, 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.*