How It Works
Combine Numbers
Select two numbers and an operation (+, −, ×, ÷) to create new numbers. Reach the target to win.
New Puzzle Daily
A fresh puzzle every day at midnight. Same puzzle worldwide so you can compare with friends.
Build Streaks
Solve puzzles daily to build your streak. Track your stats and try to beat your best.
Synthwave Aesthetic
Immerse yourself in a retro-futuristic synthwave world with neon glows, pulsing animations, and a dark theme that's easy on the eyes.
Smart Hints
Stuck? See how many moves the optimal solution takes, or watch a quick ad to reveal the next best move. No spoilers.
Share Results
Share your daily results with friends without spoiling the puzzle. Show off your streak and move count.
Works Offline
No internet required. Puzzles are generated locally on your device. Play anywhere, anytime.
Ready to Train Your Brain?
Download Synthsum for free and join the daily challenge.