# 対局時計 将棋 囲碁 vs Go Clock Duo

The clearest difference is update cadence: 対局時計 将棋 囲碁 at monthly against Go Clock Duo's every 2 months. 対局時計 将棋 囲碁 also leads on iOS requirement (15.1 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 対局時計 将棋 囲碁 sells 1 one-off in-app purchase and Go Clock Duo sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

対局時計 将棋 囲碁 ships an update monthly, Go Clock Duo every 2 months. The most recent releases landed on November 4, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | 対局時計 将棋 囲碁 | Go Clock Duo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Size | 21 MB | 14 MB |
| Requires iOS | **15.1** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SATOSHI UCHIDA](https://appshunter.io/developer/1802998935) | [Vincent Grellert](https://appshunter.io/developer/1886984960) |

## What reviewers say

### 対局時計 将棋 囲碁

[App page](https://appshunter.io/ios/app/id6743459288)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 無制限版 | $0.49 | one-time |


### Go Clock Duo

[App page](https://appshunter.io/ios/app/go-clock-duo-byoyomi-timer/id6795444077)

**Features:** macOS Compatibility, iPhone Duo support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $0.99 | per month |
| Pro Yearly | $8.99 | per year |
| Byoyomi Timer Pro | $24.99 | one-time |


## Frequently asked questions

### Is 対局時計 将棋 囲碁 free?

対局時計 将棋 囲碁 is free to download, with in-app purchases available.

### Is Go Clock Duo free?

Go Clock Duo is free to download, with in-app purchases available.

### Do 対局時計 将棋 囲碁 or Go Clock Duo have ads?

Neither 対局時計 将棋 囲碁 nor Go Clock Duo shows ads.

### Which is updated more often, 対局時計 将棋 囲碁 or Go Clock Duo?

対局時計 将棋 囲碁 ships an update monthly, and Go Clock Duo every 2 months. Most recently, 対局時計 将棋 囲碁 was updated on November 4, 2026 and Go Clock Duo on November 10, 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.*