# 口寄せ for 東方 vs PrimeNumbersGirl

The clearest difference is in-app purchases: 口寄せ for 東方 at none against PrimeNumbersGirl's 2. 口寄せ for 東方 also leads on ads (none vs shown). PrimeNumbersGirl's advantage is update cadence (every 5 weeks vs every 59 months) and review sentiment (100% vs 82%). On price and device support there is nothing between them.

Both are free to download. PrimeNumbersGirl sells 2 one-off in-app purchases. 口寄せ for 東方 asks for nothing beyond the download.

口寄せ for 東方 ships an update every 59 months, PrimeNumbersGirl every 5 weeks. The most recent releases landed on November 2, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 口寄せ for 東方 | PrimeNumbersGirl |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/for/id1069305487/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 82.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 59 months | **Every 5 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 113 MB | 163 MB |
| Requires iOS | 16.4 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Michitaka Oyama](https://appshunter.io/developer/998448424) | [radiuthree Co., Ltd](https://appshunter.io/developer/1158448737) |

## What reviewers say

### 口寄せ for 東方

[App page](https://appshunter.io/ios/app/for/id1069305487)

This game allows users to summon Touhou characters by entering specific phrases. It's a simple time-killing game featuring 193 characters, though completing the collection may be challenging. This is a fan-made derivative work of the Touhou Project.

**Highlights:** Summon Touhou characters, Enter summoning phrases, Simple gameplay, 193 characters included, Fan-made derivative work

**Features:** macOS Compatibility

**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 口寄せ for 東方 free?

口寄せ 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.

### Do 口寄せ for 東方 or PrimeNumbersGirl have ads?

PrimeNumbersGirl shows ads; 口寄せ for 東方 does not.

### Which is updated more often, 口寄せ for 東方 or PrimeNumbersGirl?

口寄せ for 東方 ships an update every 59 months, and PrimeNumbersGirl every 5 weeks. Most recently, 口寄せ for 東方 was updated on November 2, 2026 and PrimeNumbersGirl on October 24, 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.*