Trail – Fill the Grid Puzzle

One line. Every square. Numbers in order. Trail is a calm, clever path puzzle you play with one thumb. Start at 1, drag a single line through the grid, and fill every square exactly once – passing the numbered checkpoints in order and finishing on the last one. No crossings, no going back over your own path. The rules take ten seconds to learn. The later boards will keep you thinking much longer. A NEW PUZZLE EVERY DAY Every day brings a fresh daily puzzle – the same one for every player. Solve it to keep your streak alive, then share your result with friends without spoiling the solution. 300 HANDCRAFTED LEVELS Ten chapters of 30 levels each, rising steadily in difficulty. Boards come in all kinds of shapes – rings, diamonds, stairs and more – with walls and holes that change how you have to think. Every puzzle has a solution, and the game checks your line the moment you make your move. STUCK? GET A NUDGE Undo a move, restart the board, or take a hint. Hints are smart: if you've gone off track, Trail rewinds to the point where you went wrong and shows you the next correct step – it doesn't just solve the puzzle for you. TRACK YOUR PROGRESS • Daily streak, with a streak shield to save it on a missed day • Best time and difficulty grade for every level • Solve-time stats and a monthly calendar of your completed dailies MADE TO FEEL GOOD • Smooth, responsive drawing with satisfying sounds and haptics • Light and dark themes • Optional daily reminder so you never miss a puzzle • Works fully offline – no account, no sign-up TRAIL PLUS Trail is free to play with ads. A single one-time purchase of Trail Plus removes interstitial ads, unlocks the full daily archive, and gives you unlimited hints. No subscription. Grab a coffee, draw a line, and see how far your trail goes.