This One Thing: Single Task
ADHD Focus Todo Productivity
$4.99 · Designed for iPad. Not verified for macOS.
ADHD-friendly single-task focus: see one todo, complete it, then next. No lists, no overwhelm, no choice paralysis.
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:
• Privacy Policy: https://pragmathema.com/#this
• Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
This One Thing v1.2
Widget Update: Your Task Follows You Now
What hasn't changed: Still one task. Still no list view. Still no peeking. Still offline. Still deliberately limiting because limitation works.
What's new: Home screen widget.
Now the task finds you. No opening the app to "check what's next." It's right there. One task. One glance. One fewer excuse.
Most widgets show you everything. Calendars with 12 events. Todo lists with collapsed categories. Badges screaming "47 items!"
This widget shows one sentence. The thing you're avoiding by checking your widget.
The behavioral economics:
Friction has two types. Bad friction stops you starting. Good friction stops you escaping. Opening an app is bad friction. Seeing your whole list is an escape hatch.
Widget removes bad friction (no app launch). Keeps good friction (still can't browse tasks).
Still not for:
People who need "the full picture" (that picture paralyzes you)
Project managers (go buy OmniFocus)
Anyone who thinks more features = better (they don't)
Still perfect for:
ADHD brains who open the app and forget why
People who'd complete tasks if they just saw them more
Humans who need the next step visible, always
Three competitors still rank higher. Zero understand that reducing options increases completion.
That's still worth £4.99.
The developer, Nikola Knezevic, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Nikola Knezevic
- Size
- 753.7 KB
- Category
- Productivity
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - iPad
Requires iPadOS 26.0 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2025 Nikola Knezevic
