Double Down: Blackjack Trainer
Basic Strategy & Card Counting
About
Learn the math behind blackjack strategy with detailed breakdowns of expected value, probabilities, and decision-making. Practice with customizable rules and track your progress through focused lessons and drills.
What's New in Double Down
1.12
October 2, 2026
- Practice Hi-Lo counts across a table of up to five players in the new Table Count drill. - Combine running count, true count, and a strategy decision in Applied Counting, with separate results for each skill. - Index Plays now follows supported soft-17 and surrender rules and explains when your table rules are outside its scope. - Read clearer instructions throughout practice and Counting Lab.
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FAQ
Does Double Down have ads?
No, Double Down offers a premium, ad-free experience designed for focused practice.
How does Double Down teach strategy?
Instead of just memorizing charts, Double Down breaks down the expected value (EV) and probabilities of each decision, helping users understand the math behind optimal play.
Can I customize the blackjack rules in Double Down?
Yes, you can configure various rules including number of decks, dealer soft 17 rules, payouts, surrender options, and doubling rules to match your specific table.
Does Double Down require an account?
No account is required for core functionality. Optional iCloud sync and Game Center achievements utilize your Apple account.
What kind of progress tracking does Double Down offer?
It tracks accuracy, streaks, and decisions over time, breaking down performance by situation and highlighting recent mistakes for targeted practice.
Is Double Down suitable for beginners?
Yes, with ten focused lessons on probability and expected value, it's designed to help users learn the concepts beneath basic strategy.
What devices does Double Down support?
Double Down is available on Mac, iPhone, and iPad, offering a consistent experience across Apple devices.
How often is Double Down updated?
The app was last updated on September 8, 2026, with version 1.9, indicating active development and improvements.
