# Dr. Block vs One Line Cat

The clearest difference is update cadence: One Line Cat at every 9 days against Dr. Block's every 8 months. Dr. Block's advantage is iOS requirement (10.0 vs 14.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Dr. Block ships an update every 8 months, One Line Cat every 9 days. The most recent releases landed on October 8, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Dr. Block | One Line Cat |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 8 months | **Every 9 days** |
| Size | 31 MB | 65 MB |
| Requires iOS | **10.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SUD Inc.](https://appshunter.io/developer/453469451) | [北京微力量科技有限公司](https://appshunter.io/developer/1689176501) |

## What reviewers say

### Dr. Block

[App page](https://appshunter.io/ios/app/dr-block/id1489855738)

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

**In-app purchases:** none


### One Line Cat

[App page](https://appshunter.io/ios/app/one-line-cat/id6466617385)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Dr. Block free?

Dr. Block is free to download, with no in-app purchases.

### Is One Line Cat free?

One Line Cat is free to download, with no in-app purchases.

### Do Dr. Block or One Line Cat have ads?

Both Dr. Block and One Line Cat show ads.

### Which is updated more often, Dr. Block or One Line Cat?

Dr. Block ships an update every 8 months, and One Line Cat every 9 days. Most recently, Dr. Block was updated on October 8, 2026 and One Line Cat on October 4, 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.*