# StackorSnap > StackorSnap (also written "Stack or Snap") is a free, fast-paced brain training card game for iOS and Android with 45 unique cognitive levels. Each level has a rule: stack the cards that match it, snap the ones that don't — before the timer runs out. Players compete on global leaderboards with F1-style scoring. ## What it is - A mobile card puzzle game that trains reflexes, pattern recognition, and rule-switching. - 45 hand-designed levels across foundation, intermediate, advanced, and mastery tiers, using numbers, letters, colors, shapes, and words. - Per-card time limits keep the pace fast; global and period-based leaderboards make it competitive. - Free to play, made by StackNSnap Games. ## Download - [App Store (iOS)](https://apps.apple.com/sg/app/stackorsnap/id6748820272) - [Google Play (Android)](https://play.google.com/store/apps/details?id=com.stacknsnap.app) ## Links - [Website](https://stackorsnap.com/) - [Product Hunt](https://www.producthunt.com/products/stackorsnap) - [Terms & Privacy](https://stackorsnap.com/terms)