QSum: Number Sums Puzzle

Pixie Lab Studios

Contains ads

About this game

Add up. Clear the board. Breathe.

QSum is a cozy number sums puzzle with one simple rule: drag across neighboring tiles so their numbers add up to the target sum. Some boards ask you to make ten; others push the target higher. Clear every tile for the perfect S grade — but watch out, one greedy move can strand the rest of the board. A relaxing logic puzzle and a genuine brain workout in the same little package.

HOW TO PLAY
• Drag across neighboring tiles so they add up to the target number
• Every cleared tile counts — clear the whole board for the perfect S grade
• Stuck? Ring the hint bell to reveal the next move on the perfect path
• Plan ahead: one greedy move can leave the rest of the board unsolvable

LEVEL MODE
Four handcrafted packs, from gentle 3x3 gardens to the fiendish 6x6 Quantum Matrix. Every level is verified to have a perfect solution — this number sums game never deals you an unsolvable board.

ENDLESS MODE
Fresh number puzzles forever. Clear a board perfectly to grow your streak; one miss and it's gone. A quick mental math workout or a long zen session — your call.

HINTS WHEN YOU NEED THEM
Hints highlight the next move on the perfect path. Earn more by watching an optional ad, or grab a hint pack whenever you need one.

MADE WITH CARE
• Free to play, and playable completely offline — the perfect offline number puzzle for flights and commutes
• Warm, tactile tile design with light and dark themes
• Satisfying sounds and haptics (toggle anytime)
• No forced ads — ever. Ads are optional and always your choice
• No account, no sign-in; your progress stays on your device
• Train your brain: logic, mental math, and planning in every board

A cozy puzzle game and a math puzzle for adults who like a brain teaser with their coffee — from a tiny studio that loves number games.

What’s new

Behind the scenes: better insight into how QSum is played, so we can keep improving it.