Free cognitive tests to measure and improve your mental abilities
Stage
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Founded
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Based in
PT
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Pricing model
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Free
Pricing
Free base game with 20 European countries. Optional in-app purchases: ticket packs, continent expansions (Americas, Africa, Asia & Oceania), and Remove Ads.
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Key features
8,000 handcrafted puzzle boards
800 real nature reserves
2,000+ species to meet
Pure deduction gameplay with no guessing required
Cloud sync and offline play
Ranger Album with species facts
Daily Adventure with real parks
Friends and leaderboards
Puzzle progression from 5x5 to 10x10
Reaction Time Test - measure response to visual stimuli
Visual processing tests including Visual Memory, Symbol Search, and Color Blindness
Score tracking and comparison to other users
Leaderboard functionality
Aim Trainer test
Color Hue Test for color distinction
FPS Reaction training including Gridshot, Flick, and Tracking
What makes it different
Real nature reserves as puzzle boards with accurate habitat and species information
Completely offline gameplay with all content bundled in the app
Zero guessing puzzle design philosophy
Free base game with optional expansions
No dark patterns or engagement manipulation
No signup required - tests available immediately without account creation
Tests based on established research protocols rather than casual games
Scores stored locally in browser with no personal data tracking or sale
Accessible cognitive testing without requiring lab or academic credentials
Wild Sudoku
Human Benchmark