One Line: Draw Brain Puzzle
Connect dots in one stroke
Free · Designed for iPad. Not verified for macOS.
A new shape arrives every day. Trace it in a single stroke without lifting your finger. No timer, no rush — take as long as you need. Tomorrow, another one is waiting.
One line. Every path. Never lift your finger.
Pick a dot, follow the lines, and see if you can cover a whole shape in a single unbroken stroke. Every line has to be drawn exactly once — no more, no less.
The rule takes a moment to learn. Getting good at it takes a while longer, and that's the part worth staying for.
WHAT YOU'LL DO
• Trace a shape from end to end without lifting your finger
• Look before you draw — the dot you start from is half the answer
• Back up a line and try another way whenever a path runs out
• Meet a new twist now and then, and meet it again when it counts
BUILT FOR THINKING, NOT RUSHING
• No countdowns, no lives, no streak to lose in a hurry
• Come back to a board you've already solved and do it cleaner
• A puzzle is never a wall — there's a nudge waiting when you want one
• Worlds open one after another, each a little heavier than the last
QUIET BY DESIGN
• Plays offline, wherever you happen to be
• One hand, one finger, a minute at a time
• No account, no sign-up, nothing to set up first
• Soft night colors and quiet sound, both easy to turn off
Free to play, supported by ads.
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The developer, HLabs, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Location
- Identifiers
- Usage Data
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- HLabs
- Size
- 14.2 MB
- Category
- Puzzle
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Korean
- Age Rating
4+
- 4+
- Contains
Advertising
- Copyright
- © 2026 HLabs