NumberTrail: Connect Numbers

Connect the numbers. Fill every square. That is the whole game — and it will keep you thinking for months. NumberTrail is a number path puzzle. Draw one continuous line that runs through 1, 2, 3, 4 in order and covers every single square on the board. Ten seconds to learn. Level 1,375 is another story. ▶ HOW TO PLAY • Put your finger on 1 and drag to 2, then 3, then 4 • The line never crosses itself and never skips a square • Finish on the last number with the whole grid filled — that is a solve • Stuck? Undo as often as you like, or spend a hint ★ WHAT YOU GET • 1,375 hand-checked levels across 10 chapters • Every puzzle has exactly one solution — pure logic, never luck • 4,125 stars to collect: solve with no hints and no undo to earn all three • 72 achievements, from your first trail to a perfect chapter • 6 board themes unlocked with the coins you earn: Classic, Ocean Breeze, Candy Pop, Wooden, Neon Grid and Sketchbook • Light and dark mode across the whole app • Plays completely offline — no internet, no account, no sign-up 🧠 TEN CHAPTERS, A REAL DIFFICULTY CURVE 1. First Steps — learn the flow on small, friendly boards 2. Winding Roads — longer routes and your first real walls 3. Hidden Paths — more question marks, fewer obvious routes 4. Stone Walls — walls everywhere. Read them like clues 5. Mazeworks — irregular shapes and tight corridors 6. Night Garden — sparse clues on sprawling boards 7. Labyrinth — every wrong turn costs you. Plan ahead 8. Clockwork — precise routes through crowded boards 9. Summit — the biggest boards and the fewest hints 10. Grandmaster — only the sharpest minds finish here Each chapter unlocks when you have earned enough stars in the one before it, so the difficulty never jumps ahead of you. 🎯 THINKING, NOT RUSHING No countdown timer. No lives to lose. No energy bar to wait on. Spend five seconds or five days on a board — the puzzle waits. A clean solve is what earns three stars, so the challenge is on you, not on the clock. 🧩 IF YOU LIKE THESE, YOU WILL LIKE NUMBERTRAIL Logic puzzles, sudoku, nonogram and picross, kakuro, mazes, connect the dots, one line drawing games, snake-style path games and brain training puzzles. If you enjoy filling a grid and hearing that click when it finally works out, this is your game. ☕ MADE FOR REAL LIFE • A quick brain workout on the commute • A calm few minutes before bed, sound off • Flights, trains, tunnels and anywhere with no signal • One-handed play — everything sits inside thumb reach 🎨 MAKE IT YOURS Earn coins for every level you solve and spend them on board themes. Play under an ocean, on a candy grid, on a wooden table, on a glowing neon board or on hand-drawn sketch paper. Pick light or dark for the rest of the app and the whole game follows. 🏆 CHASE EVERY TROPHY Solve your first level. Solve ten in a row without a hint. Beat a board in under thirty seconds. Take a full chapter to three stars. The trophy room keeps the history of every single one — what you unlocked, and which level you were on when you did it. NumberTrail is free to play, small to download, and does not ask you to register. Questions, a bug, or an idea for a level? Write to [email protected] — a real person reads every mail.