# Project vs Chess Clock Duo

The clearest difference is ads: Chess Clock Duo at none against Project's shown. Project's advantage is update cadence (every 3 days vs every 3 months) and iOS requirement (17.0 vs 26.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Project sells 1 one-off in-app purchase 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.

Project ships an update every 3 days, Chess Clock Duo every 3 months. The most recent releases landed on November 5, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Project | Chess Clock Duo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 days** | Every 3 months |
| Size | 20 MB | 11 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ERDI TASPUNAR](https://appshunter.io/developer/1884089211) | [Vincent Grellert](https://appshunter.io/developer/1886984960) |

## What reviewers say

### Project

[App page](https://appshunter.io/ios/app/project-countdown/id6760356883)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Upgrade | $3.99 | one-time |


### 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 Project free?

Project 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 Project or Chess Clock Duo have ads?

Project shows ads; Chess Clock Duo does not.

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

Project ships an update every 3 days, and Chess Clock Duo every 3 months. Most recently, Project was updated on November 5, 2026 and Chess Clock Duo on November 10, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*