BJT
Built by players, for players

The Blackjack Trainer for basic strategy & Hi-Lo counting.

Practice real blackjack hands with live feedback on every move. Counting, deviations, and bankroll tools included — tuned to your exact table.

Start Playing Daily Challenge
  • Free, no ads
  • No signup to play
  • Weekly Challenge
  • All charts + deviations
  • Optional cloud sync
  • Works on mobile
Live blackjack trainer
Active blackjack hand with recommended actions, strategy feedback, and running-count and true-count readouts.
How it works

Three steps to sharper play.

Set your house rules

Decks, H17/S17, DAS, surrender, resplit aces, 3:2 or 6:5 — match the exact table you want to beat.

Play real hands

Deal, bet, split, double, and surrender at a realistic shoe. Every action is graded against the exact chart and deviation rules for that table.

Level up the count

Turn on the Hi-Lo HUD or the count quiz, enable Illustrious 18 deviations, and track your accuracy over time.

See it in action

Everything you need on one felt.

Live charts, a mistakes log that explains every missed play, real card counting, streak milestones, count quizzes, and a weak-spot drill — all inside the same table.

Accuracy summary bar showing hard 91%, soft 89%, pairs 86%, and deviations 50% at a glance.

One glance tells you where you stand across hard totals, soft totals, pairs, and count-based deviations — while the Records view breaks down how you perform by true-count bucket.

Strategy · Charts
Strategy charts panel showing Hard Totals heatmap with trouble-spot pills and deviation plays.

Live charts with trouble spots

Accuracy across hard totals, soft totals, pairs, and deviations at a glance — with your worst plays surfaced first.

Strategy · Mistakes
Mistakes log listing misplayed hands with your action, the correct action, and a one-line explanation for each.

Every mistake, explained

Each misplayed hand gets a short, plain-English reason — so you stop guessing and start knowing why the right play is right.

Discard tray on the felt with a stack of played cards growing inside, used to estimate decks remaining alongside live running-count and true-count readouts.

Count cards like you're at a real table

Live running count and true count read out beside the shoe, and deviations kick in when the count calls for them. The discard tray fills with every played card so you can eyeball decks remaining by sight — the same skill a real table demands.

Celebration banner that fires when you beat your all-time perfect-play streak record.

Streaks, milestones & records

Flawless-play streaks climb with every correct decision, hit milestone tiers, and celebrate when you break your all-time best.

Between-hands count quiz asking for the current true count, with three multiple-choice answer buttons.

Count quizzes, between hands

Running count, true count, or decks remaining — the game quizzes you on the fly so the count sticks while you're actually playing.

Ranked Challenge · This week
Ranked Challenge table at the start of a run: $100,000 bankroll, the week's ruleset locked at 6D / H17 / DAS / late surrender / 3:2, with the discard tray and chip rail ready.

Ranked Challenge — put your skills on the line

Take on a fresh weekly ruleset with the same $100,000 bankroll as everyone else. No HUD, no hints, no auto-bet — just your decisions at the table. Biggest bankroll wins, and when the week closes you can review and practice your lowest-accuracy hands.

Climb the global Top-50

String together a serious streak and your spot is saved with an auto-generated name. Add a custom name anytime. Tiered styling for the top ranks, plus weekly Ranked and streak badges for gold, silver, and bronze finishes.

Top-50 leaderboard
Global Top-50 leaderboard ranked by perfect-play streak, with tiered styling for the top ranks.

An interactive strategy reference

Learn includes every perfect blackjack basic strategy chart for 1D, 2D, and shoe games across H17/S17 rules, plus rule-aware Hi-Lo deviation charts. Move the true count to see which count-based plays are active before you memorize or test them. Want the standalone reference? The blackjack deviation chart lays out the Illustrious 18 and Fab 4 indices in profitability order, and the blackjack EV heatmap shows the dollars won or lost per hand against every dealer upcard.

Learn · Perfect Strategy
Learn page showing rule-aware perfect strategy charts, TC preview, and highlighted active Hi-Lo deviations.

Bankroll Lab — is this game worth playing?

Punch in your rules, bankroll, and spread and Bankroll Lab returns EV per hour, risk of ruin, hours to N0, and a realistic session range — calibrated from up to 100 million simulated rounds. A one-line verdict says whether the setup clears your risk target or needs a bigger bankroll.

Learn · Bankroll Lab
Bankroll Lab forecasting EV per hour, long-run risk of ruin, spread edge, and hours to N0 for the configured rules, bankroll, and bet spread, with a session-outlook range below.
Bankroll Lab · Live session
Live Bankroll Lab session 500 rounds in: cumulative actual net plotted against expected with a ±1 SD band, a round-by-round tooltip showing actual, expected, and ±1 SD, plus summary cards for actual net, expected net, luck delta, and average bet.

Track real sessions against the forecast

Practice the Lab setup in the trainer and every round gets recorded against the forecast in real time. Watch cumulative actual net track expected net inside a ±1 SD band, with luck delta and z-score updating round by round — so you can tell whether a hot or cold session is variance or a real problem with the spread.

Features

Everything a serious player needs.

One tool for strategy, counting, deviations, and bankroll — no scattered apps.

Real blackjack, real practice

Deal full hands and bet for real, with live grading and an optional EV coach on every decision.

Sit at the table

Strategy charts, deviations & EV

Every basic-strategy chart for 1D, 2D, and shoe games, rule-aware Hi-Lo deviations, and a dollar-value EV heatmap.

Open Learn

Daily Challenge — same shoe for everyone

One deterministic 15-hand shoe, dealt the same to everyone. One attempt a day — highest bankroll takes the crown.

Play today

Ranked Challenge & leaderboards

A fresh weekly ruleset and $100,000 to grow. Climb the global Top-50 and earn streak badges.

Enter this week

Bankroll Lab — is this game worth playing?

Forecast EV/hour, risk of ruin, and N0 for any rules and spread, then track real sessions against it.

Open Bankroll Lab
FAQ

Common questions.

Quick answers. Still curious? The charts and settings panels are the best tour.

Is the blackjack trainer really free?
Yes — the whole trainer is free, with no ads. Every feature is included, from strategy grading to card counting to Bankroll Lab. The only thing you can pay for is the optional Supporter tier, which unlocks cosmetics only.
Does it work on mobile?
Yes — it's built mobile-first, with a drag-to-dismiss bottom sheet, large count chips, and an optional reverse action bar for thumb reach. You can install it to your home screen as an app for a full-screen, offline-friendly experience. Desktop is still the richest experience.
Can I customize house rules?
Yes. Number of decks, dealer hits or stands on soft 17, double after split, late or early surrender, resplit aces, hit split aces, blackjack payout (3:2 or 6:5), penetration, and table min/max are all configurable.
Does it include every basic strategy chart?
Yes. The trainer and Learn page both use every perfect basic-strategy chart for 1D, 2D, and shoe games across H17/S17 rules. Learn also includes large rule-aware Hi-Lo deviation sets, and TC preview shows which count-based plays are active.
Which card counting system does it teach?
Hi-Lo, the most popular balanced system. The trainer shows both running count and true count, and can quiz you on either plus decks remaining.
How can I practice deviations?
Turn on Deviation practice to drill enabled index plays and insurance. Choose exactly which deviations are enabled, so you can learn a few at a time instead of taking on the whole set at once. Memorize mode always deals spots where the deviation applies; Test mode mixes in counts where basic strategy is still correct, so you have to know when to deviate and when not to.
Can it show how the count affects bet sizing?
Yes. Auto bet spread can turn the live true count into wager size each betting round. It is meant to show the payoff loop — high counts press the bet, cold shoes stay small, and bankroll swings make the benefit of disciplined counting easier to feel while you learn.
What is the expected-value (EV) heatmap?
A rule-aware chart of how much each starting hand is worth — the dollars you win or lose per $100 bet when you're dealt that hand against the dealer's upcard and play it perfectly. It's computed exactly (not just simulated) for any decks, H17/S17, DAS, surrender, 6:5 vs 3:2, and true count, so you can see which spots make money and which only lose less. A toggle compares basic strategy against count-deviation play, and a live version in the trainer shows the EV of hit, stand, double, and split as you decide.
Can I sync my progress across devices?
Yes — sign in with Google and your training history, bankroll, settings, and custom leaderboard name follow you across devices. It's optional; anonymous play works the same.
What is the Ranked Challenge?
A weekly competition with a fresh ruleset and the same $100,000 starting bankroll for everyone. No count display, no hints, no feedback, no auto-bet — just your decisions at the table. Biggest bankroll wins, and when the week closes you can review and practice your lowest-accuracy hands.
What is the Daily Challenge?
A new shoe every day that everyone plays from the exact same deal — 15 hands, one attempt, $2,500 to start. Because the cards are identical for every player, it comes down purely to your decisions. Finish with the highest bankroll to take that day's crown, and come back each day to keep your daily streak going.
Is there a leaderboard?
Yes — a global Top-50 ranked by perfect-play streak and accuracy. You start with an anonymous auto-generated name. Sign in to choose a custom name; renames are limited to once per hour. Top ranks get tiered styling, and your rank stays pinned at the top — tap it to jump to your row.
What is the weak-spot drill?
A focused practice mode that watches your mistake history and rotates the cells you miss most often — hard, soft, pairs, surrender, and Hi-Lo deviations if you have them turned on — so you train where it matters.
What is Bankroll Lab?
Bankroll Lab forecasts whether a game is worth playing. Enter your rules, bankroll, and bet spread and it returns EV per hour, risk of ruin, N0, and a realistic session range, all calibrated from large-scale Monte Carlo simulations. Practice the same setup in the trainer and the Lab tracks observed net against the forecast round by round with a luck delta and z-score, so you can see whether a result is variance or a real problem with the spread.
What does the Supporter tier include?
An optional way to help keep the trainer free and ad-free — it unlocks cosmetics only: premium table themes, card backs, an illustrated Classic card face, and a tinted leaderboard name. It's $3/month or $30/year, cancel anytime, and never affects gameplay or your odds.

Ready to play a hand that actually teaches you something?

Perfect basic strategy, Hi-Lo counting, and deviations — graded live at your own table.

Deal me in Browse Learn
  • No signup to play
  • Runs in your browser
  • Optional cloud sync