Threadline icon: a red thread running through a board of nine tiles

Threadline

Leave no cell behind

A path puzzle with one simple rule: draw a single unbroken thread through every cell on the board, passing the numbers in order.

Get it on Google Play

Free for Android

How it plays

A minute to learn. Finishing a board with three stars is another matter.

1

Start on 1

Put your finger on the first number and drag.

2

Numbers in order

Reach every number, one after the other.

3

Fill every cell

Each cell exactly once. Finish on the last number before the clock runs out.

See it in play

Every level has exactly one solution, so there is always a way through and never a guess.

A level in play: a blue thread drawn through half of a board of numbered cells A larger board with portals and color gates, the thread changing color as it goes The card shown before a boss level, with its time limit and the thread it gives The level complete card with three stars and a score The daily puzzle screen with a streak and a calendar of solved days The level list, colored by the rule each stretch of levels teaches The collection of threads that can be won

Seven twists to master

New rules arrive as you go, each taught with a short demo before you meet it. Later levels mix them together.

Walls

Some cells are fenced off from their neighbors. Find the way round.

Arrow tiles

A tile you can only cross in the direction it points.

Portals

Step in at one end and your thread carries on from the other.

Color gates

Pads dye your thread. A gate opens only for its own color.

Fog

The board stays hidden until your thread comes close.

Hexagons

Six-sided cells, and six ways out of every one.

Mirror

A second thread copies every move you make. Mind them both.

More than a level list

Hundreds of levels, with more on the way, and a reason to come back each day.

A new puzzle every day

Everyone gets the same board. Solve it day after day to build your streak, and share your result without giving the answer away.

Boss levels

Every tenth level is a boss: a bigger board, a tighter clock and double the score.

Chase three stars

Stars are lost to the clock one at a time. Score extra for a clean run, then go back and beat your best.

Win new threads

Beat bosses and keep streaks to unlock new threads to draw with.

Find the one way through

Free to play and supported by ads. No account, no sign-up, and it plays offline.

Get it on Google Play