# Rule 20 vs Blink

The clearest difference is in-app purchases: Rule 20 at none against Blink's 3. Rule 20 also leads on update cadence (every 2 days vs every 5 days) and iOS requirement (15.1 vs 18.0). Blink's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Blink sells 3 in-app purchases, starting at $0.49 per 7 days. Rule 20 asks for nothing beyond the download.

Rule 20 ships an update every 2 days, Blink every 5 days. Both last shipped on November 5, 2026.

## The numbers

| Metric | Rule 20 | Blink |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 2 days** | Every 5 days |
| Size | 34 MB | 27 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Daniil Korzh](https://appshunter.io/developer/1887070950) | [Saksham Virmani](https://appshunter.io/developer/1896714617) |

## What reviewers say

### Rule 20

[App page](https://appshunter.io/ios/app/rule-20-20-20/id6760965580)

**Features:** macOS Compatibility

**In-app purchases:** none


### Blink

[App page](https://appshunter.io/ios/app/blink-20-20-20-timer/id6770090513)

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Blink Premium Weekly | $0.49 | per 7 days |
| Blink Premium Yearly | $9.99 | per year |
| Blink Premium Lifetime | $24.99 | one-time |


## Frequently asked questions

### Is Rule 20 free?

Rule 20 is free to download, with no in-app purchases.

### Is Blink free?

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

### Do Rule 20 or Blink have ads?

Rule 20 shows ads; Blink does not.

### Which is updated more often, Rule 20 or Blink?

Rule 20 ships an update every 2 days, and Blink every 5 days. Most recently, Rule 20 was updated on November 5, 2026 and Blink on November 5, 2026.

---

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