Knock One Off
Focus on One Task at a Time
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Too much at once, and nothing gets finished? See just one task, right on your lock screen. Complete it there, and a cut-paper cat pushes it off the desk.
Too many tabs open. A to-do list that keeps growing. You start ten things at once and finish none of them, and every time you open your list, all of it stares back at you.
Knock One Off shows you only the one thing in front of you. Your lock screen holds a single task: the one you're doing now. When it's done, a cut-paper cat pushes it off the desk and the next one slides in.
ONE TASK, RIGHT ON YOUR LOCK SCREEN
• Your current task sits on the lock screen and in the Dynamic Island as a Live Activity
• Complete it from the lock screen, no need to open the app
• The next task slides in on its own
• Tapped done by mistake? Undo it
• iOS ends a Live Activity after up to 8 hours (it can stay on the lock screen for up to 4 more). Open the app and the card comes back
A CAT THAT CLEARS THE DESK
• Every finished task gets pushed off the desk by a cat drawn in Japanese cut-paper style
• When the list is empty, the cat roams the desk: stretching, napping, rolling over
• 12 cats and 5 scenes
YOUR LIST, IN YOUR ORDER
• Add, edit, and drag to reorder
• Repeating tasks: daily, weekly on the days you pick, monthly, or every N days. Skip once when you need to
• Optional "from when": a dated task shows up on that day; a timed task jumps to the front at that time, with a countdown on the lock screen
• No notifications unless you set them
• Look back at what you've finished
NO ACCOUNT, NO ADS
• No sign-up, no ads, no tracking
• Works offline
• Optional iCloud sync (off by default)
FREE VS. ONE-TIME PURCHASE
Free: every feature above, with 4 cats and 2 scenes.
Collect Them All (one-time purchase, not a subscription): all 12 cats and 5 scenes, plus any added later. Works with Family Sharing.
Requires iOS 18 or later. iPhone only.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Minor bug fixes.
The developer, RUI QI, 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
- RUI QI
- Size
- 33.7 MB
- Category
- Productivity
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
English and 7 more
- English, French, German, Japanese, Korean, Simplified Chinese, Traditional Chinese, Vietnamese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Collect Them All $7.99
- Copyright
- © 2026 RUI
