A to Z — Letter Merge Puzzle

Swipe to slide, match to merge — A+A=B, B+B=C, all the way to Z - now available on macOS.

Swipe. Merge. Climb the alphabet.

Zed is a beautifully simple sliding puzzle: swipe to slide the tiles, and two matching letters merge into the next one — A + A = B, B + B = C, all the way to Z. Easy to learn in seconds, genuinely hard to master.

Watch the UP NEXT row to see what's landing on your next swipe, plan your merges, and don't let the board lock up. Reach Z and you've completed the alphabet.

EIGHT WAYS TO PLAY • Easy, Medium & Hard — the classic climb, with tighter letters and more undos on Easy, scarcer matches and hidden previews on Hard. • Quick — a five-minute race for the highest score on a cramped 3 × 3 board. • Long — a marathon climb across a roomy 5 × 5. • Zen — no score, no game over. Just merging. Breathe. • Endless — no finish line: climb past Z to Z², Z³ and beyond. • Daily — one shared challenge a day. Every player in the world gets the same board and the same letters. Keep your streak alive — and turn on the evening reminder so you never lose it.

New modes unlock as you play, so there's always a next milestone.

MAKE IT YOURS • Six tile themes — Zed, Ocean, Sunset, Pastel, Vibrant and Mono. • Sound effects, ambient music and rich haptics, each with its own toggle. • A softly drifting background, or switch it off for something calmer.

TRACK YOUR CLIMB • Top-10 leaderboards for every mode. • Lifetime stats: games played, merges, play time, best daily streak and your highest letter ever. • Everything syncs through iCloud, so a new iPhone picks up right where you left off.

PLAY YOUR WAY • Undo your last moves (Easy, Medium and Hard). • Second Chance when the board locks up. • A saved game that's always waiting exactly where you left it. • Full VoiceOver and Voice Control support.

Zed is free to play. A single one-time purchase removes ads forever.

How far down the alphabet can you get?