# OneTask ADHD Focus Timer vs SketchCalc

The clearest difference is ads: OneTask ADHD Focus Timer at none against SketchCalc's shown. OneTask ADHD Focus Timer also leads on update cadence (weekly vs every 2 weeks). SketchCalc's advantage is iOS requirement (15.0 vs 18.6). On price, in-app purchases and device support there is nothing between them.

Both are free to download. OneTask ADHD Focus Timer sells 2 in-app purchases, starting at $4.99 per month and SketchCalc sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

OneTask ADHD Focus Timer ships an update weekly, SketchCalc every 2 weeks. The most recent releases landed on November 11, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | OneTask ADHD Focus Timer | SketchCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/onetask-adhd-focus-timer/id6757357252/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | Freemium | — |
| Size | 15 MB | 48 MB |
| Requires iOS | 18.6 | **15.0** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [QUANTUMPARADOX STUDIO PRIVATE LIMITED](https://appshunter.io/developer/1095662507) | [OZGUN EVREN ERTURK](https://appshunter.io/developer/6786822342) |

## What reviewers say

### OneTask ADHD Focus Timer

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

This app helps individuals with ADHD focus on completing one task at a time. It features a simple interface with a timer, streak tracking, and a brain dump function to manage overwhelming to-do lists. The goal is to encourage task completion and reduce procrastination.

**Highlights:** Single task focus, Time blindness solution, Streak tracking, Brain dump for task management, Mascot encouragement, Ad-free experience

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**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 |


### SketchCalc

[App page](https://appshunter.io/ios/app/sketchcalc-bill-split-and-math/id6786822339)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SketchCalc Pro | $8.99 | one-time |


## Frequently asked questions

### Is OneTask ADHD Focus Timer free?

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

### Is SketchCalc free?

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

### Do OneTask ADHD Focus Timer or SketchCalc have ads?

SketchCalc shows ads; OneTask ADHD Focus Timer does not.

### Which is updated more often, OneTask ADHD Focus Timer or SketchCalc?

OneTask ADHD Focus Timer ships an update weekly, and SketchCalc every 2 weeks. Most recently, OneTask ADHD Focus Timer was updated on November 11, 2026 and SketchCalc on November 10, 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.*