# Chess Clock Free vs Calendar Clock

The clearest difference is price: Chess Clock Free at Free against Calendar Clock's $0.99. Chess Clock Free also leads on update cadence (every 10 months vs every 41 months) and review sentiment (15% vs 0%). Calendar Clock's advantage is in-app purchases (none vs 1). On ads and device support there is nothing between them.

Chess Clock Free is free to download; Calendar Clock costs $0.99 up front. Chess Clock Free sells 1 one-off in-app purchase. Calendar Clock asks for nothing beyond the download.

Chess Clock Free ships an update every 10 months, Calendar Clock every 41 months. The most recent releases landed on October 10, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Chess Clock Free | Calendar Clock |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/chess-clock-free/id519708948/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | **15.4% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 10 months** | Every 41 months |
| Monetization | **Free** | Paid |
| Size | 18 MB | 4 MB |
| Requires iOS | **5.1.1** | 26.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Piet Jonas](https://appshunter.io/developer/288060167) | [Systemiko Inc.](https://appshunter.io/developer/680630947) |

## What reviewers say

### Chess Clock Free

[App page](https://appshunter.io/ios/app/chess-clock-free/id519708948)

This application functions as a digital timer for two players, ideal for games like chess. It ensures fair play by tracking individual move times and preventing excessive delays. The timer can count up or down and operates in the background.

**Highlights:** Dual player time tracking, Count up or down timer, Pause functionality, Background operation, Customizable time settings

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Chess Clock Upgrade | $0.99 | one-time |


### Calendar Clock

[App page](https://appshunter.io/ios/app/calendar-clock/id1451445740)

This app displays the current year, month, week, and time on a single screen with a clean design. It offers customizable theme colors and functions as a desk clock. The app disables device sleep mode while active.

**Highlights:** All-in-one screen display, Year, month, week, day, hour, minute, second, Switchable theme colors (dark, light, green, blue), Disables device sleep mode, Acts as a desk clock

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Chess Clock Free free?

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

### Is Calendar Clock free?

Calendar Clock costs $0.99, with no in-app purchases.

### Do Chess Clock Free or Calendar Clock have ads?

Neither Chess Clock Free nor Calendar Clock shows ads.

### Which is updated more often, Chess Clock Free or Calendar Clock?

Chess Clock Free ships an update every 10 months, and Calendar Clock every 41 months. Most recently, Chess Clock Free was updated on October 10, 2026 and Calendar Clock on October 15, 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.*