OneTrail: One Line Draw Puzzle
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Everyone
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About this game
Draw the whole figure in one continuous line. Never lift your finger, never trace the same line twice.
OneTrail generates every board on your device, and verifies that a solution exists before showing it to you. You will never be handed an impossible puzzle.
■ Five ways to play
· Journey - 8 worlds x 30 stages (240 boards): grid, diagonal, triangular, radial, mandala and web. Seeded, so stage 4-12 is the same board on every device.
· Daily puzzle - one board a day for the whole world. The shape and difficulty change with the weekday, and a calendar tracks your streak.
· Endless - choose the shape, the size, the difficulty, and whether the trail has to return to where it started. A fresh board every time.
· 60-second Rush - how many can you clear in a minute? They grow as you go.
· Gallery - 26 classic figures designed by hand and verified one by one: the envelope, Santa's house, the bridges of Koenigsberg, the Star of David, a snowflake, a gear wheel and more.
■ Difficulty that matches how it feels
Difficulty is not measured by counting lines. It is measured by how likely a player drawing at random is to finish in one go. The more branching traps a board hides, the lower that number - which is exactly what makes a puzzle feel hard.
■ Hints that never lie
A hint does not simply point at a line. It works out whether the lines you have left can still be finished, and if you are already stuck it rewinds you to the last moment the puzzle was still alive. You can also ask the game to stop you from making a fatal move at all.
■ Made to be quiet
· Fully offline - it works from start to finish in airplane mode
· No account, no login. Every record stays on this device
· No location, camera, microphone or storage permission
· Ads never gate the game. Hints are a bonus, and when no ad is available we simply grant them anyway
· Light and dark theme, left-handed layout, adjustable line thickness
■ Records that add up
Best times, total clears, lines drawn, undo and hint usage, daily streaks and achievements. Back up and restore everything by copying a single string.
Languages: English, Korean, Japanese, Chinese, Spanish, Portuguese, French, German, Russian, Indonesian.
OneTrail generates every board on your device, and verifies that a solution exists before showing it to you. You will never be handed an impossible puzzle.
■ Five ways to play
· Journey - 8 worlds x 30 stages (240 boards): grid, diagonal, triangular, radial, mandala and web. Seeded, so stage 4-12 is the same board on every device.
· Daily puzzle - one board a day for the whole world. The shape and difficulty change with the weekday, and a calendar tracks your streak.
· Endless - choose the shape, the size, the difficulty, and whether the trail has to return to where it started. A fresh board every time.
· 60-second Rush - how many can you clear in a minute? They grow as you go.
· Gallery - 26 classic figures designed by hand and verified one by one: the envelope, Santa's house, the bridges of Koenigsberg, the Star of David, a snowflake, a gear wheel and more.
■ Difficulty that matches how it feels
Difficulty is not measured by counting lines. It is measured by how likely a player drawing at random is to finish in one go. The more branching traps a board hides, the lower that number - which is exactly what makes a puzzle feel hard.
■ Hints that never lie
A hint does not simply point at a line. It works out whether the lines you have left can still be finished, and if you are already stuck it rewinds you to the last moment the puzzle was still alive. You can also ask the game to stop you from making a fatal move at all.
■ Made to be quiet
· Fully offline - it works from start to finish in airplane mode
· No account, no login. Every record stays on this device
· No location, camera, microphone or storage permission
· Ads never gate the game. Hints are a bonus, and when no ad is available we simply grant them anyway
· Light and dark theme, left-handed layout, adjustable line thickness
■ Records that add up
Best times, total clears, lines drawn, undo and hint usage, daily streaks and achievements. Back up and restore everything by copying a single string.
Languages: English, Korean, Japanese, Chinese, Spanish, Portuguese, French, German, Russian, Indonesian.
Draw it all in one line, never lifting your finger. Every board is solvable.
Updated on
Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
What’s new
First release.
- Journey: 8 worlds, 240 stages
- Daily puzzle with a streak calendar
- Endless mode and 60-second Rush
- Gallery of 26 classic one-line figures
- Hints that rewind you out of a dead end
- Fully offline, 10 languages, light and dark theme
- Journey: 8 worlds, 240 stages
- Daily puzzle with a streak calendar
- Endless mode and 60-second Rush
- Gallery of 26 classic one-line figures
- Hints that rewind you out of a dead end
- Fully offline, 10 languages, light and dark theme
