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A number puzzle for Android

Sumfold: a calm number puzzle. Merge. Grow. Relax.

A quiet 2048-style sliding-number puzzle. Swipe to bring matching numbers together, build bigger tiles and choose your own goal, on boards from 4×4 to 8×8. No timer, no pressure and nothing to buy.

Get it on Google Play
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Free · No ads · Works offline
Boards from 4×4 to 8×8
How to play

Swipe, merge and grow

  • 1

    Swipe:

    Every tile slides as far as it can in that direction.
  • 2

    Merge:

    Two tiles with the same number join into one: 2 and 2 make 4, 4 and 4 make 8, and so on.
  • 3

    Grow and keep going:

    A new small tile appears after every move. Reach your goal, celebrate, and carry on as far as you like.
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Play your way

Play your way

A quiet sliding-number puzzle with no timer, no pressure and nothing to buy. Just you and the board.

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Five board sizes

The classic 4×4, or more room on 5×5, 6×6, 7×7 and 8×8. Each keeps its own game.
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Choose your goal

512, 1024, 2048, 4096 or Endless, with a slim progress bar toward it.
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Undo and hints

Undo up to ten moves, and get a gentle nudge when you’re stuck.
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Calm mode

Hides the score, best and progress, so only the board remains.
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Six themes

Pastel Classic, Coastal, Sunset and Sage, plus dark Night Garden and Midnight Ink.
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Your progress

Autosave, a Stats page with personal bests for every board size, and shareable finished boards.
Make it yours

Themes, sound and settings that suit you

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Six themes

Soft pastel Classic, Coastal, Sunset and Sage, plus dark Night Garden and Midnight Ink.

Six backgrounds

With adjustable blur on Android 12 and newer, and light or dark mode that can follow your phone.

Optional sound

Effects in three styles and a calm background loop. Both stay off until you switch them on.

Readable and comfortable

Adjust tile spacing, swipe sensitivity, haptics and animation, with a reduced-animation mode.

Quiet by design.

Sumfold has no ads, no accounts, no internet access and no tracking. Your progress lives on your phone, and you can back it up to a file and restore it on a new one. Get help with Sumfold.

No ads

No banners, no videos between levels, nothing to sell you.

No account

No sign-up and no sign-in. Open the game and play.

Works offline

The game never goes online. Nothing you do leaves your phone.

Nothing to buy

No in-app purchases or subscriptions. Help is earned or free.

Need help with Sumfold? How to play, troubleshooting, FAQ and bug reports.

Sumfold support
Questions, answered

Sumfold FAQ

The fair questions to ask before you install. Need more help? Visit support.

Yes. It’s free on Google Play, with no ads and no in-app purchases.

Yes, it uses the same sliding-and-merging idea, made calmer: choose your own goal, play bigger boards, undo moves, ask for hints, or hide the score with Calm mode.

Yes. Celebrate, then keep going as far as you like, or choose Endless from the start.

No. Sumfold works completely offline.

4×4 is the classic challenge. Bigger boards give you more room and longer games.

No. Every board saves automatically, so you can carry on where you left off.

A few thoughtful moves at a time. Sumfold is free on Google Play.

Get it on Google Play
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