# ADHD Focus vs This One Thing

The clearest difference is price: ADHD Focus at Free against This One Thing's $4.99. ADHD Focus also leads on update cadence (every 3 days vs every 6 weeks) and iOS requirement (17.0 vs 26.0). This One Thing's advantage is in-app purchases (none vs 2). On ads and device support there is nothing between them.

ADHD Focus is free to download; This One Thing costs $4.99 up front. ADHD Focus sells 2 in-app purchases, starting at $1.99 per 7 days. This One Thing asks for nothing beyond the download.

ADHD Focus ships an update every 3 days, This One Thing every 6 weeks. The most recent releases landed on October 25, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | ADHD Focus | This One Thing |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 6 weeks |
| Size | 32 MB | 1 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Appgineering GbR](https://appshunter.io/developer/1785233826) | [Nikola Knezevic](https://appshunter.io/developer/1774051159) |

## What reviewers say

### ADHD Focus

[App page](https://appshunter.io/ios/app/adhd-focus-that-one-thing/id6746286274)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ThatOneThing Premium (1 week) | $1.99 | per 7 days |
| ThatOneThing Premium (1 year) | $3.99 | per year |


### This One Thing

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ADHD Focus free?

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

### Is This One Thing free?

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

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

Neither ADHD Focus nor This One Thing shows ads.

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

ADHD Focus ships an update every 3 days, and This One Thing every 6 weeks. Most recently, ADHD Focus was updated on October 25, 2026 and This One Thing on October 30, 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.*