We're happy to help with anything KardShark.
KardShark is a cozy, interactive trainer for learning the Hi-Lo blackjack card-counting system. If you run into a problem, have a question, or want to share feedback, just email us — we read every message.
Open Settings (the ⚙️ icon) → Reset progress, then confirm.
Entirely on your own device. There are no accounts and nothing is uploaded — see our Privacy Policy.
Use the 🎵 and 🔊 buttons in the top bar, or toggle them in Settings.
Tap How to Play on the home screen, or open the Cheat Sheet for the Hi-Lo tags, the bet ramp, and a full basic-strategy chart. Turn on Coach mode in Settings to see each card's tag while you learn.
No. KardShark is for entertainment and education — it teaches a skill using simulated hands and involves no real-money wagering.