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Boom 21 app icon

Boom 21 · iPhone & iPad

Make 21.
Go BOOM!

Four dynamite columns. Three cards to plan ahead. Place each card, build toward 21, and turn a burning fuse into an explosive score.

Take your time: fuses count moves, not seconds. Your next clever decision is worth waiting for.

Offline play · No account · English & Turkish

An exact 21 clears a column with a fiery explosion and a Perfect 21 celebration

Simple to learn. A lot to plan.

Tap a column to place the current card. Aces count as 1; J, Q and K count as 10. Each column holds up to five cards, and the next three cards stay visible in the upper-right corner.

Hit exactly 21

Clear the column instantly with a fiery jackpot. An exact 21 doubles that column’s base points before the level multiplier is applied.

Plan four moves ahead

Reach the level’s threshold to light a four-move fuse. Playing another column burns it down; adding to the lit column resets it if the total stays below 21. At zero, it cashes out automatically.

Protect your three lives

Go over 21, or fill all five slots below the threshold, and you lose a life. Leveling up restores three lives. When a run ends, the results screen lets you start again.

Three ways to play

Choose your challenge.

Classic

Build your run

Climb through 17+, 18+, 19+ and 20+ thresholds. At mastery, fuses remain active at 20+ and your score multiplier reaches ×5. Exact 21s can restore a life, up to three.

FINAL 21

Go straight to the expert game

A separate mode with no fuses or automatic cash-outs. Only an exact 21 clears a column for points. Start with three lives; each exact 21 restores one, up to three.

Daily Deal

Same deck. A better plan

A fixed deck for each UTC date, using the Classic progression rules. Play up to 100 moves and retry that day’s deck to improve your score. No internet connection required.

Clear two or more columns for points in the same move to earn a Double Boom bonus of 25% on that move’s base gain.

Big moments. A clear board.

Real screens from the current game. Full-column fire, glowing fuses and comic-style celebrations bring each move to life. Messages sit above the board so the explosion stays in view.

Boom 21 board with four dynamite columns, current card and three upcoming cards at the upper right
Every card counts
An active dynamite column with one move remaining on its fuse
Watch the fuse
A dynamite column exploding in flames as a BOOM score celebration appears above the board
Turn the fuse into points
An exact 21 clears a column with a fiery explosion and a Perfect 21 celebration
Make a perfect 21
Level 2 celebration above the board announcing three lives restored
Level up. Keep going
Settings with large rows for sound effects, motion and shake, vibration, and language
Play your way

Easy to pick up. Easy to return to.

Comfortable controls

Large settings rows and clear labels. Adjust sound effects, motion and screen shake, and vibration independently. Turn motion off to remove shake and particle effects.

English & Turkish

Switch languages in Game menu → Sound, motion & language. The game’s interface and instructions update with your choice.

Automatic saves

Your current run, settings and records save on your device. Return to your board later without an account or cloud sign-in.

Your personal best

Review your last 50 runs and your best scores by mode in History & records. Each attempt gives you a new score to chase.

Play offline

All three modes work without an internet connection. No ads, no account and no in-app purchases in the current game.

A clear next step

When your last life is gone, the results screen shows how you did and offers another game. The opening tutorial teaches the basics in three moves.