Rainline

About Rainline

A one-stroke path puzzle. Draw a single line through every square on the board, reaching the numbered stops in order. New puzzles every day, and every one can be solved by reasoning.

Start at 1 and draw one line through every block of the grid, passing the numbers in order. Walls block the way. As your line grows it runs through the colours of the rainbow, so every solved board ends as a full gradient. Every level can be solved by reasoning.

How to play Rainline

1. Start at 1 and drag. The line follows your finger.
2. Pass the numbers in order: 1, 2, 3 and on.
3. Fill every block. The last number ends the line.
4. Drag back to erase, or tap Undo.

What's inside

• A new daily puzzle for everyone, easy early in the week and hard at the weekend, with a streak and a shareable result
• Endless levels from 5×5 to 7×7, easy to hard
• Hints that rewind your line to the last good spot and draw the next steps
• Free hints for solving without help
• Light and dark mode, sound and haptics
• Plays offline, no account needed

Rainline screenshots

Rainline questions