# フラッシュ暗算検定模試（協会） vs Primo

The clearest difference is review sentiment: Primo at 50% against フラッシュ暗算検定模試（協会）'s 0%. Primo also leads on price (Free vs $3.99) and update cadence (monthly vs every 28 months). フラッシュ暗算検定模試（協会）'s advantage is in-app purchases (none vs 10) and iOS requirement (8.0 vs 12.0). On ads and device support there is nothing between them.

Primo is free to download; フラッシュ暗算検定模試（協会） costs $3.99 up front. Primo sells 9 in-app purchases, starting at $3.49 per month. フラッシュ暗算検定模試（協会） asks for nothing beyond the download.

フラッシュ暗算検定模試（協会） ships an update every 28 months, Primo monthly. The most recent releases landed on October 18, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | フラッシュ暗算検定模試（協会） | Primo |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/id879920206/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | **50.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 28 months | **Monthly** |
| Monetization | — | Free with in-app purchases |
| Size | 15 MB | 258 MB |
| Requires iOS | **8.0** | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | +4 | 4+ |
| Developer | [Yuji Miyamoto](https://appshunter.io/developer/417390646) | [INTERNATIONAL LABORATORY OF MUSIC EDUCATION](https://appshunter.io/developer/1493879437) |

## What reviewers say

### フラッシュ暗算検定模試（協会）

[App page](https://appshunter.io/ios/app/id879920206)

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

**In-app purchases:** none


### Primo

[App page](https://appshunter.io/ios/app/primo/id1493879438)

This app offers dailyソルフェージュ exercises to build fundamental music skills like reading sheet music, identifying pitches by ear, and understanding rhythm. It aims to make music education accessible and affordable for everyone, regardless of location or prior experience.

**Highlights:** Sheet music reading practice, Ear training exercises, Rhythm and timing drills, Sight-reading simulations, Music history and appreciation content, Specialized theory problem collections

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 読譜（どくふ） | $3.49 | per month |
| 初見（しょけん） | $3.49 | per month |
| リズム | $3.49 | per month |
| 聴音（ちょうおん） | $3.49 | per month |
| まとめ買い | $13.99 | per month |
| シュトラウス | $0.99 | one-time |
| 山田耕筰 | $0.99 | one-time |
| ドビュッシー | $0.99 | one-time |
| シベリウス | $0.99 | one-time |


## Frequently asked questions

### Is フラッシュ暗算検定模試（協会） free?

フラッシュ暗算検定模試（協会） costs $3.99, with no in-app purchases.

### Is Primo free?

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

### Do フラッシュ暗算検定模試（協会） or Primo have ads?

Neither フラッシュ暗算検定模試（協会） nor Primo shows ads.

### Which is updated more often, フラッシュ暗算検定模試（協会） or Primo?

フラッシュ暗算検定模試（協会） ships an update every 28 months, and Primo monthly. Most recently, フラッシュ暗算検定模試（協会） was updated on October 18, 2026 and Primo on October 12, 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.*