# 数字あそび for 東方 vs PrimeNumbersGirl

The clearest difference is in-app purchases: 数字あそび for 東方 at none against PrimeNumbersGirl's 2. PrimeNumbersGirl's advantage is update cadence (every 5 weeks vs every 103 months) and device support. On price there is nothing between them.

Both are free to download. PrimeNumbersGirl sells 2 one-off in-app purchases. 数字あそび for 東方 asks for nothing beyond the download.

数字あそび for 東方 ships an update every 103 months, PrimeNumbersGirl every 5 weeks. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 数字あそび for 東方 | PrimeNumbersGirl |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/for/id1108908667/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | — | Yes |
| Update frequency | Every 103 months | **Every 5 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 95 MB | 163 MB |
| Requires iOS | 16.4 | **12.0** |
| Devices | — | **iPhone, iPad, iPod** |
| Age rating | 9+ | 4+ |
| Developer | [Michitaka Oyama](https://appshunter.io/developer/998448424) | [radiuthree Co., Ltd](https://appshunter.io/developer/1158448737) |

## What reviewers say

### 数字あそび for 東方

[App page](https://appshunter.io/ios/app/for/id1108908667)

A puzzle game where you merge numbers to create larger ones. Swipe to move all numbers on the screen, and when identical numbers collide, they combine into a doubled value. Clear stages by reaching the target number displayed.

**Highlights:** Number merging puzzle gameplay, Swipe to move numbers, Combine identical numbers for doubled values, Stage-based progression, Target number objectives, Multiple stages included

**In-app purchases:** none


### PrimeNumbersGirl

[App page](https://appshunter.io/ios/app/primenumbersgirl/id1329465291)

Embark on a love story adventure centered around prime numbers. Engage in a simple yet captivating game where you must quickly determine if given numbers are prime. Success unlocks positive outcomes, while incorrect answers may lead to playful reprimands.

**Highlights:** Prime number identification gameplay, Interactive story with a mysterious girl, Judgment-based challenges, Unlockable events based on performance, Playful consequences for wrong answers

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hide ads | $0.99 | one-time |
| 金の素数ガチャ | $0.99 | one-time |


## Frequently asked questions

### Is 数字あそび for 東方 free?

数字あそび for 東方 is free to download, with no in-app purchases.

### Is PrimeNumbersGirl free?

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

### Which is updated more often, 数字あそび for 東方 or PrimeNumbersGirl?

数字あそび for 東方 ships an update every 103 months, and PrimeNumbersGirl every 5 weeks. Most recently, 数字あそび for 東方 was updated on October 21, 2026 and PrimeNumbersGirl on October 24, 2026.

---

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