ArrowLoop

How to play

• Tap between two dots to draw a line, or drag to keep drawing.
• Edges with arrows are drawn for you. Each arrow says: this edge is traveled in this direction.
• Join the lines into one closed loop. A dot can hold at most two lines, so the loop never branches or crosses.
• Travel around your loop. If you move the same way as every arrow, the puzzle is solved.
• When you know an edge is not used, press and hold to mark it with an X.

What makes it tick

A closed shape is only half the answer. The loop also has to run the right way for every arrow. One arrow decides where a line must go, and that line has to agree with the next arrow along the way.

Every puzzle has exactly one answer, so you can reason your way to the last line without guessing.

Features

• 1,500+ puzzles in two modes: a gentle Normal and a thoughtful Hard
• Boards grow from tiny 3×3 intro puzzles to the final 7×7
• Every puzzle is machine-checked to have exactly one solution
• Solve a puzzle and the lines turn light blue as a glow travels around the loop
• Stuck? A hint draws a correct line and points out wrong ones
• Close the app mid-puzzle and your lines and X marks are still there
• Japanese and English

A good fit if you

• Enjoy working through dots and lines with pure logic
• Want a calm puzzle for a commute, a short wait or a quiet evening
• Like clean, paper-and-ink screens with plenty of space

At a glance