# This One Thing vs Focus One

The clearest difference is price: Focus One at Free against This One Thing's $4.99. Focus One also leads on update cadence (every 2 weeks vs every 6 weeks) and iOS requirement (18.0 vs 26.0). This One Thing's advantage is ads (none vs shown). On in-app purchases and device support there is nothing between them.

Focus One is free to download; This One Thing costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

This One Thing ships an update every 6 weeks, Focus One every 2 weeks. The most recent releases landed on November 8, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | This One Thing | Focus One |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Every 2 weeks** |
| Size | 1 MB | 6 MB |
| Requires iOS | 26.0 | **18.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Nikola Knezevic](https://appshunter.io/developer/1774051159) | [BYNET](https://appshunter.io/developer/1811735131) |

## What reviewers say

### This One Thing

[App page](https://appshunter.io/ios/app/this-one-thing-single-task/id6753627958)

**Features:** macOS Compatibility

**In-app purchases:** none


### Focus One

[App page](https://appshunter.io/ios/app/focus-one-adhd-and-focus-timer/id6756911974)

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

**In-app purchases:** none


## Frequently asked questions

### Is This One Thing free?

This One Thing costs $4.99, with no in-app purchases.

### Is Focus One free?

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

### Do This One Thing or Focus One have ads?

Focus One shows ads; This One Thing does not.

### Which is updated more often, This One Thing or Focus One?

This One Thing ships an update every 6 weeks, and Focus One every 2 weeks. Most recently, This One Thing was updated on November 8, 2026 and Focus One on November 9, 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.*