# This One Thing vs OneTask ADHD Focus Timer

The clearest difference is price: OneTask ADHD Focus Timer at Free against This One Thing's $4.99. OneTask ADHD Focus Timer also leads on update cadence (weekly vs every 6 weeks) and iOS requirement (18.6 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.

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

This One Thing ships an update every 6 weeks, OneTask ADHD Focus Timer weekly. The most recent releases landed on October 1, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | This One Thing | OneTask ADHD Focus Timer |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Weekly** |
| Size | 1 MB | 15 MB |
| Requires iOS | 26.0 | **18.6** |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Nikola Knezevic](https://appshunter.io/developer/1774051159) | [QUANTUMPARADOX STUDIO PRIVATE LIMITED](https://appshunter.io/developer/1095662507) |

## 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


### OneTask ADHD Focus Timer

[App page](https://appshunter.io/ios/app/onetask-adhd-focus-timer/id6757357252)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Focus · Gentle Focus Plan | $4.99 | per month |
| Yearly Focus · Gentle Focus Plan | $29.99 | per year |


## Frequently asked questions

### Is This One Thing free?

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

### Is OneTask ADHD Focus Timer free?

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

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

Neither This One Thing nor OneTask ADHD Focus Timer shows ads.

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

This One Thing ships an update every 6 weeks, and OneTask ADHD Focus Timer weekly. Most recently, This One Thing was updated on October 1, 2026 and OneTask ADHD Focus Timer on October 2, 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.*