Blackjack coach

Walk up to the table knowing the right play.

Play real hands at a real table. Book 21 grades every decision against the book for your table's exact rules, and tells you why in plain words.

Coming soon to iPhone and Android. Free to start, and never real money.

Your turn at the table, holding hard 16 against a dealer 10 What the book says at the table: the chart opens over the hand, hard 16 against a 10 is Hit The full hard hands chart for this table, with hard 16 against a 10 lit up The coach on hard 12 against a 7: the book hits, and the chart shows where the dealer finishes The coach explains a stand on 12 against a 7, where the book hits A drill, hard 11 against a 9, graded by the book 25 decisions in a row by the book

The book

Every hand has a right play. Most people at the table don't know it.

It's called basic strategy, and the casino's edge shrinks to almost nothing when you use it. Book 21 turns the chart into habit, one hand at a time, so you aren't guessing with real chips in front of you.

A city skyline at night and a cruise ship at sea, joined by a dotted route

Got a trip coming up?

Vegas this spring. A cruise in June. Get table-ready before you go.

Set your destination and your date, and Book 21 sets up the exact rules you'll find there. It counts down the days, shows how table-ready you are, and on the day itself it hands you the few plays that cover the most hands.

  • Tables for the Las Vegas Strip, cruise ships and more
  • A budget planner that shows what a night at the table really costs
  • Your table's chart, one tap away and offline at sea

No trip planned? It's just as good for a regular night out.

Trip day for the Las Vegas Strip, with the few plays that cover the most hands
The trip budget, showing two hours at $10 a hand costs about $7.43 on average
A full table with other players in the seats

A real table

Full hands from a real shoe.

Other players fill the seats, the dealer checks for blackjack, and the shoe runs down like it does in the casino. Pick the rules on your cruise ship or in Vegas and practice that exact game.

The coach's note on a hand

A coach on every decision

Graded on the call, never the cards.

A right play that loses is still right. The coach tells you what the book says, why, and what the other play would have cost you over the long run. A miss is just a spot to practice.

The numbers behind the call

See what every play is worth.

The coach shows where the dealer is likely to finish and what each play is worth on your bet, over many hands. Sometimes every choice loses a little. The book loses least, and a right call that loses is still right.

After each shoe, it adds up the spots where the book plays it differently and sends them to your drills, so you practice the hands you actually miss.

Hard 12 against a 7 on a $25 bet: hitting is worth -$5.32, standing -$11.88 and doubling -$12.67
A shoe review: standing on 12 against a 7 loses $11.88 on average, hitting saves $6.56

What the book says

The whole chart for your exact table.

Six decks or one, dealer hits or stands on soft 17, surrender or not. The chart changes with the rules, and Book 21 always shows the one for your table. Your hand lights up, with the reason in plain words.

  • Hard hands, soft hands and pairs, every square
  • Plain rules for when a chart is too much
  • Works offline, at sea or on the casino floor
The hard hands chart for a six-deck table, with hard 16 against a dealer 10 lit up as Hit
The soft hands and pairs charts, colored by hit, stand, double and split

Drills

Make the play. Find the slip. Add it up.

Fast drills for the hands that trip people up. Make the call on tricky totals, soft hands and pairs, and keep count of the cards.

In the film room, a hand plays out step by step. Somewhere a player went off the book, and your job is to spot it. Then the coach shows what the book does and why.

A Your call drill: hard 11 against a 9, graded by the book
The film room: against a dealer 4, a player hit hard 12. Spotted it, the book stands on 12 against 4 to 6.
A streak of 25 decisions by the book

Progress you earn

Streaks and badges for playing it right.

Rewards come from good decisions only. Never from winning, betting big or luck. Get to 25 in a row by the book and the dealer starts to notice.

“A right call that loses is still right.”

The book

Your next trip starts at the practice table.

Free to start. No real money, no chips to buy, ever.

Download on theApp Store Get it onGoogle Play