# Color Timer vs OTB Clock

The clearest difference is in-app purchases: Color Timer at none against OTB Clock's 1. Color Timer also leads on iOS requirement (15.0 vs 17.0). OTB Clock's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 5 months). On price and device support there is nothing between them.

Both are free to download. OTB Clock sells 1 in-app purchase, starting at $19.99 per year. Color Timer asks for nothing beyond the download.

Color Timer ships an update every 5 months, OTB Clock every 2 weeks. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Color Timer | OTB Clock |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 2 weeks** |
| Size | 45 MB | 1 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Seulki Eom](https://appshunter.io/developer/1718927408) | [杰 向](https://appshunter.io/developer/1860305678) |

## What reviewers say

### Color Timer

[App page](https://appshunter.io/ios/app/color-timer-visual-countdown/id6736859241)

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

**In-app purchases:** none


### OTB Clock

[App page](https://appshunter.io/ios/app/otb-clock/id6762344990)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium — Yearly | $19.99 | per year |


## Frequently asked questions

### Is Color Timer free?

Color Timer is free to download, with no in-app purchases.

### Is OTB Clock free?

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

### Do Color Timer or OTB Clock have ads?

Color Timer shows ads; OTB Clock does not.

### Which is updated more often, Color Timer or OTB Clock?

Color Timer ships an update every 5 months, and OTB Clock every 2 weeks. Most recently, Color Timer was updated on October 30, 2026 and OTB Clock on October 24, 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.*