# 色そろばん vs Qdeck

The clearest difference is price: Qdeck at Free against 色そろばん's $7.99. Qdeck also leads on update cadence (daily vs every 26 months). 色そろばん's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.

Qdeck is free to download; 色そろばん costs $7.99 up front. Qdeck sells 1 one-off in-app purchase. 色そろばん asks for nothing beyond the download.

色そろばん ships an update every 26 months, Qdeck daily. The most recent releases landed on October 15, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | 色そろばん | Qdeck |
| --- | --- | --- |
| Price | $7.99 | **Free** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 26 months | **Daily** |
| Size | 98 MB | 71 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [kei watanabe](https://appshunter.io/developer/1351571003) | [FRAGMENT, LLC.](https://appshunter.io/developer/1488058907) |

## What reviewers say

### 色そろばん

[App page](https://appshunter.io/ios/app/id1351571004)

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

**In-app purchases:** none


### Qdeck

[App page](https://appshunter.io/ios/app/qdeck-ocr/id6755375805)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Print out | $0.99 | one-time |


## Frequently asked questions

### Is 色そろばん free?

色そろばん costs $7.99, with no in-app purchases.

### Is Qdeck free?

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

### Do 色そろばん or Qdeck have ads?

Neither 色そろばん nor Qdeck shows ads.

### Which is updated more often, 色そろばん or Qdeck?

色そろばん ships an update every 26 months, and Qdeck daily. Most recently, 色そろばん was updated on October 15, 2026 and Qdeck 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.*