Free plan: 3 identifications and 1 follow-up per day, basic value range, up to 200 saved specimens when signed in. Plus plan: $2.50 per month billed yearly ($29.99 annually) or $9.99 per month billed monthly; 100 requests a day shared across identifications and follow-ups, detailed price analysis, m
Free: no card needed. Plus: 14€/month or 139€/year (save 17%). Pro: 39€/month or 399€/year (save 15%).
Key features
Upload 1-3 photos of the same rock from different angles
AI-powered photo analysis to suggest rock matches
View visible clues, limitations and possible alternatives for each match
Follow-up questions about lookalikes and properties
Save photos, results and conversations to an account
Browse reference links to educational resources for suggested matches
Track daily identification allowance remaining
Price analysis and estimated value range for specimens
Explain chess positions in plain language
Three coaching prompts: Coach, Trainer, and Beginner
Import games from lichess.org and chess.com
Create and share custom coaching prompts
Free AI models available
Paid AI models (DeepSeek, OpenAI gpt-6-luna)
Full Stockfish on server with paid plans
Visualize moves on interactive chess board
What makes it different
No sign-up or app download required to start identifying rocks
Photo-based identification with transparent uncertainty acknowledgment
Works on any device with a browser and internet connection
Mobile-friendly with camera option where supported
All photo tools share the same subscription and daily allowance
Explains why moves work, not just what to play
Answers appear on the board for visual learning
Personalized coaching prompts for different skill levels