# そろばん問題集 vs blnk

The clearest difference is in-app purchases: blnk at none against そろばん問題集's 1. blnk also leads on update cadence (every 10 days vs every 6 weeks) and iOS requirement (13.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. そろばん問題集 sells 1 in-app purchase, starting at $1.99 per month. blnk asks for nothing beyond the download.

そろばん問題集 ships an update every 6 weeks, blnk every 10 days. The most recent releases landed on October 24, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | そろばん問題集 | blnk |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (5 ratings)](https://appshunter.io/ios/app/id1527023159/reviews)** | — |
| Number of ratings | **5** | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 6 weeks | **Every 10 days** |
| Size | 6 MB | 6 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [takeshi inoue](https://appshunter.io/developer/1452042026) | [SATOSHI KIMURA](https://appshunter.io/developer/6792411536) |

## What reviewers say

### そろばん問題集

[App page](https://appshunter.io/ios/app/id1527023159)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告非表示 | $1.99 | per month |


### blnk

[App page](https://appshunter.io/ios/app/blnk/id6792411534)

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

**In-app purchases:** none


## Frequently asked questions

### Is そろばん問題集 free?

そろばん問題集 is free to download, with in-app purchases available.

### Is blnk free?

blnk is free to download, with no in-app purchases.

### Do そろばん問題集 or blnk have ads?

Both そろばん問題集 and blnk show ads.

### Which is updated more often, そろばん問題集 or blnk?

そろばん問題集 ships an update every 6 weeks, and blnk every 10 days. Most recently, そろばん問題集 was updated on October 24, 2026 and blnk on October 17, 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.*