Zero21: Solitaire Puzzle

Contains adsIn-app purchases
Content rating
Everyone
50+
Downloads
Content rating
Everyone
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About this game

Welcome to Zero21: Solitaire Puzzle, a fresh twist on classic card games that will test your math and logic skills. Your goal is simple: clear the board by playing all the layered cards, but you must keep your running total between 0 and 21. If you drop below zero or go over 21, you bust!

Strategic Gameplay
Navigate overlapping card formations similar to Mahjong or classic Solitaire. You can only play cards that are completely exposed. Plan your moves carefully as you balance positive (blue) and negative (red) cards to maintain the perfect sum.

Powerful Lifelines
Stuck on a difficult level? Use your hard-earned gems in the shop to unlock game-changing power-ups:

Undo: Take back your last move to save your streak.

Discard: Trash an unwanted card from the board.

Hold Slot: Save a tricky card for the perfect moment.

MIN/MAX/MID Cards: Instantly reset your total to stay alive.

Features:

Hundreds of engaging logic puzzle levels.

Daily challenges to test your brain and earn extra rewards.

Beautiful, clean graphics with smooth card-stacking mechanics.

Play offline anytime, anywhere.

Perfect for fans of traditional solitaire, math games, and brain training.
Clear the board! Add or subtract cards to keep your total between 0 and 21.
Updated on
Oct 12, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • This app may share these data types with third parties
    Device or other IDs
  • This app may collect these data types
    Location, Personal info and 3 others
  • Data is encrypted in transit

What’s new

Welcome to the global launch of Zero21: Solitaire Puzzle!

500+ Levels: Keep your total between 0 and 21 to clear the board without busting.

Power-ups: Unlock the Undo, Discard, Hold Slot, and MIN/MAX cards.

Daily Challenges: Test your brain every day for extra gems.

Download now and test your math and logic skills!