Progressive blindfold chess training from square recognition to full games
Turn playlists into QR music cards for guessing games
Stage
Not given
Not given
Founded
Not given
Not given
Based in
FR
Not given
Pricing model
Freemium
Paid
Pricing
Free: €0 forever with unlimited exercises, games vs AI, and access to levels 1-3. Pro Lifetime: €39 one-time payment for all 7 levels, all 8 AI difficulties, famous games library, endgame training, and intermediate tactics.
Digital PDF: €13 for up to 500 cards. Printed A4 sheets: from €19. Printed cards: from €21 for 50 cards, €67 for 500 cards. Gift box: €6.99 (discounted for multiple boxes). QRGames! add-on: €5 per playlist. App Designer: €9 one-time account upgrade.
Key features
7 progressive training levels from square colors to full blindfold games
Unlimited exercises and games against AI
Voice-controlled play in 6 languages
Progress tracking and achievement system
Cross-device synchronization
Famous grandmaster games to replay blindfolded
Endgame training module
Multiple board visibility modes
Tactical puzzles and exercises
Support for Spotify, Apple Music, YouTube Music, Tidal and Deezer playlists
Customizable card design with personal photos, logos and fonts
Digital PDF format for instant home printing
Free companion app for iOS and Android to scan and play cards
Music Bingo, Music Trivia and Music Timeline game modes
Verified release years checked by AI and manual review
Up to 10 different card designs in a single deck
App Designer to customize the app's appearance with personal branding
Optional gift box with custom lid design and personal message
What makes it different
Systematic progression from fundamentals to blindfold mastery, not just a side effect of puzzle training
Free tier is genuinely free with no dark patterns or engagement manipulation
One-time €39 lifetime payment with no subscription required
Built and maintained by a single indie developer actively improving the product
Available across web, iOS, and Android with unified account
Advanced AI algorithm for accurate release year determination with manual verification
One-time purchase with no subscription or recurring fees
Ability to add songs to existing orders after purchase
Compatibility with Hitster cards and other QR music card games in the app
Earn discount credits by sharing playlists with the community
DarkSquares
QRSong!