# Numbers 123 Activity Book Lite vs ProbabilityPlayer

The clearest difference is in-app purchases: Numbers 123 Activity Book Lite at none against ProbabilityPlayer's 1. Numbers 123 Activity Book Lite also leads on iOS requirement (10.3 vs 18.0). ProbabilityPlayer's advantage is update cadence (monthly vs every 12 months). On price, ads and device support there is nothing between them.

Both are free to download. ProbabilityPlayer sells 1 one-off in-app purchase. Numbers 123 Activity Book Lite asks for nothing beyond the download.

Numbers 123 Activity Book Lite ships an update every 12 months, ProbabilityPlayer monthly. The most recent releases landed on November 2, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Numbers 123 Activity Book Lite | ProbabilityPlayer |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 12 months | **Monthly** |
| Monetization | — | Free with in-app purchases |
| Size | 71 MB | 9 MB |
| Requires iOS | **10.3** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Suave Solutions](https://appshunter.io/developer/415880778) | [Motonari Hibi](https://appshunter.io/developer/386737172) |

## What reviewers say

### Numbers 123 Activity Book Lite

[App page](https://appshunter.io/ios/app/numbers-123-activity-book-lite/id1041892592)

**Features:** macOS Compatibility, 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 Numbers 123 Activity Book Lite free?

Numbers 123 Activity Book Lite is free to download, with no in-app purchases.

### Is ProbabilityPlayer free?

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

### Do Numbers 123 Activity Book Lite or ProbabilityPlayer have ads?

Neither Numbers 123 Activity Book Lite nor ProbabilityPlayer shows ads.

### Which is updated more often, Numbers 123 Activity Book Lite or ProbabilityPlayer?

Numbers 123 Activity Book Lite ships an update every 12 months, and ProbabilityPlayer monthly. Most recently, Numbers 123 Activity Book Lite was updated on November 2, 2026 and ProbabilityPlayer on November 4, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*