This One Thing vs Focus One
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
This One Thing
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The productivity problem you've never heard of: Every todo app shows you everything. Your brain sees the list and freezes. Psychologists call it "choice paralysis." We call it Tuesday. This One Thing: Single Task; ADHD Focus Todo Productivity solves the opposite problem: not how to organize your tasks, but how to hide them. Here's how it works: Add unlimited tasks (your brain needs to capture everything) See exactly ONE task at a time (your eyes need to focus on THIS ONE THING) Complete it to reveal the next (no peeking, no planning, no paralysis) Skip if you must (but it goes to the back of the line) What you won't find here: Priority levels (everything's a priority, which means nothing is) Due dates (artificial urgency is still anxiety) Categories (organizing is procrastinating with extra steps) Collaboration (focus is a solo sport) Gamification (you're not a rat in a maze) What you will find: One task. One screen. One decision. A timer that shows focus time (what you measure, you value) Statistics that matter (streak days, completion count) Design that looks expensive (because restraint is luxury) The behavioral economics: Rory Sutherland, vice chairman of Ogilvy, says the best solutions solve the problem backwards. Instead of "how do I get more done?" ask "what stops me from starting?" The answer: seeing everything stops you from doing anything. THIS ONE THING makes the limitation into the feature. You can't see task #2 until task #1 is done. Not because we're mean, but because your brain works better that way. Who this is for: People with 50+ tasks who complete zero Anyone who reorganizes their todo list instead of doing it Humans who overthink, overplan, and underexecute Those who know that "just start" works but can't make themselves start Who this isn't for: People who need to see the big picture (this app deliberately hides it) Teams (there's no sharing, no sync, no collaboration) Planners (there's no calendar, no projects, no someday/maybe) This app makes your life harder in exactly one way: you can't avoid the next task by looking at other tasks. No escaping into "planning." No comfort of "I'll do that other thing first." Just you and THIS. Every time. Most apps try to make work easier. This one makes avoidance harder. That's worth $4.99. Privacy: Your tasks live on your device. No account, no cloud, no tracking. We don't know what you're doing, and we don't want to. RESOURCES: โข Privacy Policy: https://pragmathema.com/#this โข Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Focus One
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Focus One is a simple focus timer for people who want to start one task, stay with it, and reduce mental clutter. Choose what you will do now, set a timer, and begin. The app keeps the screen quiet so you can return to the one thing in front of you. The settings screen lets you choose the app language, so the app can be localized to the language you select. Useful for study, work, Pomodoro-style sessions, ADHD-friendly routines, and building a visible focus record over time.
Screenshots
Verdict
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.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
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.
| Parameter | This One Thing | Focus One |
|---|---|---|
| Price | $4.99 | Free โ better |
| Update frequency | Every 6 weeks | Every 2 weeks โ better |
| Ads | No โ better | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad โ better | iPhone |
| Requires iOS | 26.0 | 18.0 โ better |
| Further details โ not scored | ||
| Size | 1 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Nikola Knezevic | BYNET |
In-app purchases
This One Thing
No in-app purchases
Focus One
No in-app purchases









