# Chess Clock Blitz vs Chess Clock Duo

The clearest difference is update cadence: Chess Clock Blitz at every 3 days against Chess Clock Duo's every 3 months. Chess Clock Blitz 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. Chess Clock Blitz sells 2 in-app purchases, starting at $3.99 per month and Chess 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.

Chess Clock Blitz ships an update every 3 days, Chess Clock Duo every 3 months. The most recent releases landed on October 31, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Chess Clock Blitz | Chess Clock Duo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/chess-clock-blitz/id6774277034/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 60 MB | 11 MB |
| Requires iOS | **15.1** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | +4 | 4+ |
| Developer | [Kamil Podlasek](https://appshunter.io/developer/1608091233) | [Vincent Grellert](https://appshunter.io/developer/1886984960) |

## What reviewers say

### Chess Clock Blitz

[App page](https://appshunter.io/ios/app/chess-clock-blitz/id6774277034)

A reliable and fast chess timer for over-the-board games. Offers common time controls or custom setups for practice and tournaments. Features large tap zones, sound/haptic feedback, and clear display.

**Highlights:** Two-player chess clock, Multiple time controls (Bullet, Blitz, Rapid, Classical), Large tap zones for play, Pause, resume, and reset functions, Custom player times, Sound and haptic feedback, Clear, high-contrast display

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $3.99 | per month |
| Premium | $29.99 | per year |


### Chess Clock Duo

[App page](https://appshunter.io/ios/app/chess-clock-duo-blitz-timer/id6792531599)

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

**In-app purchases (3)**

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


## Frequently asked questions

### Is Chess Clock Blitz free?

Chess Clock Blitz is free to download, with in-app purchases available.

### Is Chess Clock Duo free?

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

### Do Chess Clock Blitz or Chess Clock Duo have ads?

Neither Chess Clock Blitz nor Chess Clock Duo shows ads.

### Which is updated more often, Chess Clock Blitz or Chess Clock Duo?

Chess Clock Blitz ships an update every 3 days, and Chess Clock Duo every 3 months. Most recently, Chess Clock Blitz was updated on October 31, 2026 and Chess 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.*