# そろばん電卓 〜計算を楽しもう〜 vs 進数ノック

The clearest difference is in-app purchases: そろばん電卓 〜計算を楽しもう〜 at none against 進数ノック's 1. そろばん電卓 〜計算を楽しもう〜 also leads on iOS requirement (6.0 vs 17.0). 進数ノック's advantage is update cadence (daily vs monthly). On price, ads and device support there is nothing between them.

Both are free to download. 進数ノック sells 1 one-off in-app purchase. そろばん電卓 〜計算を楽しもう〜 asks for nothing beyond the download.

そろばん電卓 〜計算を楽しもう〜 ships an update monthly, 進数ノック daily. The most recent releases landed on October 29, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | そろばん電卓 〜計算を楽しもう〜 | 進数ノック |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Daily** |
| Monetization | Free | — |
| Size | 9 MB | 6 MB |
| Requires iOS | **6.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [suzuki katsuya](https://appshunter.io/developer/448034238) | [Hikaru Hakata](https://appshunter.io/developer/6796209163) |

## What reviewers say

### そろばん電卓 〜計算を楽しもう〜

[App page](https://appshunter.io/ios/app/id1067519909)

This app displays the calculation process of a soroban (abacus) for arithmetic operations entered on a calculator. It visually demonstrates how abacus beads move to solve addition, subtraction, multiplication, and division problems. Users can customize calculation order and bead speed.

**Highlights:** Visual abacus calculation display, Supports addition, subtraction, multiplication, division, Handles negative number subtraction, Customizable bead speed, Customizable multiplication order

**Features:** macOS Compatibility

**In-app purchases:** none


### 進数ノック

[App page](https://appshunter.io/ios/app/radixdrill/id6796209161)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告非表示 | $1.99 | one-time |


## Frequently asked questions

### Is そろばん電卓 〜計算を楽しもう〜 free?

そろばん電卓 〜計算を楽しもう〜 is free to download, with no in-app purchases.

### Is 進数ノック free?

進数ノック is free to download, with in-app purchases available.

### Do そろばん電卓 〜計算を楽しもう〜 or 進数ノック have ads?

Neither そろばん電卓 〜計算を楽しもう〜 nor 進数ノック shows ads.

### Which is updated more often, そろばん電卓 〜計算を楽しもう〜 or 進数ノック?

そろばん電卓 〜計算を楽しもう〜 ships an update monthly, and 進数ノック daily. Most recently, そろばん電卓 〜計算を楽しもう〜 was updated on October 29, 2026 and 進数ノック on October 31, 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.*