Learn
Seven short lessons, from why counting works to deviations. Each ends in a ten-question check — nine right and you move on.
Count21Coming soonKeep the count.
Trust the play.
Count21 teaches blackjack card counting one skill at a time — short lessons, focused drills and a practice table that explains your decisions.
iPhone & iPad · iOS 17 or later · Free to start
Running count+2last card 4♠ → +1
+12 3 4 5 6
07 8 9
−110 J Q K A
Try it
Six cards. One number.
This is the running-count drill, straight from the app. Add +1 for 2–6, nothing for 7–9, and −1 for tens and aces.
K♠♠
5♥♥
9♦♦
2♣♣
4♠♠
A♥♥
What’s the running count after these six cards?
The method
Learn it. Drill it. Play it.
Drill
Five self-paced drills — card values, running count, true count, basic strategy, deviations — with an explanation after every answer.
Play
A six-deck practice table that reviews every decision and checks your count. Accuracy is measured separately from winning.
Nothing hidden
See what’s left in the shoe.
Inspect remaining cards by rank, reveal running and true counts, copy the shuffle seed and replay its exact deck order. Review your hand history or export it as CSV. Hints and shoe inspection mark a hand as assisted, so your stats stay honest.
- 6 decks
- Dealer stands on soft 17
- Double after split
- Late surrender
Pricing
Try it free. Unlock it once.
Free download
$0
- Lessons 1 and 2
- Unlimited card-value drills
- Ten practice-table hands
Count21 Complete
$14.99 one time
- All seven lessons
- All five drills, guided or recall
- Unlimited practice hands
- Decision reviews, count checks, shoe inspection and history export
No subscription. No ads. In-app purchase via the App Store.
On your device
Progress and hand history are stored locally. No Count21 account, no cloud sync.
No ads, no tracking
No advertising, analytics or tracking SDKs. Data Not Collected.
Works offline
Practice anywhere. A connection is only needed to buy or restore Complete.