Blackjack 21 Downloads & RevenueBlackjack 21: Card Trainer · App Store
Blackjack 21: Card Trainer is #87 in Games › Casino Grossing in India and charting in 5 of 30 countries we track.
Updated 9 Nov 2026 · rankings refresh through the day
DeveloperBlackJack Trainer 21 Training AG
CategoryGames
PriceFree
Released
Rating★ 4.6 (126)
Version3.3.0
Age rating12+
First seen by us
24 Sep 2026
24 Sep 2026Installs (est.)500k+ worldwide
Blackjack 21: Card Trainer update history & changes
Last change · 25 events since 10 Feb 2013Full timeline ↓⭐Passed 1K ratings⭐Passed 1K ratings📈Charting in a new country in 2 charts📈Entered the top 100🔎#1 for “card counting”🔎Top 10 for “blackjack”📦Updated to version 3.3.0🆕First spotted by AppInsider📦Version 3.1.5🆕Released on the App Store
Full timeline · 25 events
- 📈Blackjack 21: Card Trainer charting in a new country in 2 chartsIndonesia · Russia
- 📈Blackjack 21: Card Trainer entered the top 100Top Grossing · Casino · IN
- 🔎Blackjack 21: Card Trainer reached #1 for “card counting”#1 in France search · popularity 20
- 🔎Blackjack 21: Card Trainer reached Top 10 for “blackjack”#9 in Russia search · popularity 57
- 📈Blackjack 21: Card Trainer entered the top 100Top Free · Casino · AE
- 📈Blackjack 21: Card Trainer entered the top 100Top Grossing · Casino · AE
- ✏️Blackjack 21: Card Trainer: app got bigger44 MB → 72 MB (+65%)
- 📈Blackjack 21: Card Trainer entered the top 100Top Free · Casino · CA
- 📦Blackjack 21: Card Trainer updated to version 3.3.0We’ve implemented under-the-hood optimizations and visual refinements to ensure your strategy training remains smooth and precise. Good luck at the tables!
- 📈Blackjack 21: Card Trainer entered the top 100Top Free · Casino · SA
- 📈Blackjack 21: Card Trainer charting in a new country in 3 chartsBrazil · Canada · Saudi Arabia
- 📈Blackjack 21: Card Trainer entered the top 100Top Grossing · Casino · SA
- 📈Blackjack 21: Card Trainer charting in a new countryUnited Arab Emirates
- 📈Blackjack 21: Card Trainer entered the top 100Top Free · Casino · IN
- 📈Blackjack 21: Card Trainer charting in a new country in 3 chartsUnited Kingdom · India · Italy
- 📈Blackjack 21: Card Trainer entered the top 100Top Grossing · Casino · GB
- 🆕Blackjack 21: Card Trainer first spotted by AppInsider#76 in Top Free · Casino · Australia
- 📦Blackjack 21: Card Trainer version 3.1.5No release notes
- 🆕Blackjack 21: Card Trainer released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Rating
4.6 ★
126 ratings
Measured
Best rank now
#87
Games › Casino GrossingMeasured
New ratings a week
8.2
▲ +6% vs the 2 weeks before
Measured
Blackjack 21: Card Trainer at a glance
AI summary written from our chart and store data. It can be wrong: check the numbers above.
Card Trainer Realistic Casino short sessions Premium
#blackjack #strategy #education #cards #training #simulation
Blackjack 21: Card Trainer on the App Store
App details
App ID
597239290
Publisher
BlackJack Trainer 21 Training AG
On the store since
Feb 2013
13 years on the store
Minimum OS
iOS 16.0+
iPhone 8 and later
Devices
iPhone · iPad
Universal purchase · Game Center
Content rating
12+
1 content note below
Languages
1
EN
Size
72 MB
Also listed in
Casino
Content notesInfrequent/Mild Simulated Gambling
Blackjack 21: Card Trainer downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Apple publishes no download counts. App Store downloads come from chart positions and daily rating growth per country, calibrated on Google Play install counts; lifetime installs from ratings worldwide × installs per rating. Confidence is the chance the real number is within half to double ours.
Where Blackjack 21: Card Trainer's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
Retention · share of new users still active
Day 1
Day 7
Day 30
Time spent · per daily user
Average time spent Pro
min a day
Sessions a day Pro
Time per session Pro
min
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
Business model: In-app purchase-led
How Blackjack 21: Card Trainer makes money: subscriptions, one-off purchases and ads.
SubscriptionsIn-app purchases
Subscriptions
/mo
of revenue
Top in-app purchases · App Store US, most popular first
| 1 | All PRO features - yearly subscription | |
| 2 | All PRO features - monthly subscription | |
| 3 | Soft Hand Training Mode | |
| 4 | Pair Practice Mode | |
| 5 | Custom Table Settings | |
| 6 | Flash Sale! PRO - yearly subscription | |
| 7 | Flash Sale! PRO - monthly subscription | |
| 8 | All PRO features - yearly subscription | |
| 9 | All PRO features - yearly subscription | |
| 10 | All PRO features - lifetime subscription |
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| India | Games › CasinoGrossing | #87 |
 France | Games › CasinoFree | #103 |
 United Kingdom | Games › CasinoFree | #173 |
 Canada | Games › CasinoFree | #120 |
| Australia | Games › CasinoFree | #125 |
Apps near Blackjack 21: Card Trainer on the chart
Games › Casino Grossing, around #87.
Ratings
App Store, worldwide.
Rating
4.6 ★
126 ratings
Measured
Ratings
126
Measured
Review momentum
ⓘ How we measure thisNew ratings a week
8.2
▲ +6% vs the 2 weeks before
Lifetime rating
4.6★
recent stars not readable yet: new ratings are a tiny share of the total
Review momentum
66/100
faster than 75% of Games apps
Review momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
About Blackjack 21: Card Trainer
Make Better Decisions at the Blackjack Table
Learn exactly when to Hit, Stand, Split, Double or Surrender - and why.
Blackjack 21: Strategy Trainer is your personal guide to basic strategy. It teaches you the fundamentals through real hands and instant feedback
⋄ Practice Real Blackjack Decisions
Hit, Stand, Split, Double or Surrender — train your choices on realistic hands.
⋄ Get Instant Feedback
See if your move matches basic strategy, and understand why it was right or wrong.
⋄ View the Basic Strategy Table
Access a full strategy chart that adapts to your selected house rules.
⋄ Learn to Play Like a Professional
Build confidence and make better decisions through structured practice.
⋄ No Money, No Counting, No Distractions
This is a Blackjack training app, not a game. There’s no simulated or real money, and no card counting involved.
___________________________
What Users Say
⋆⋆⋆⋆⋆
"I finally know when to double or surrender. Love having the strategy table in my pocket."
⋆⋆⋆⋆⋆
"This really helped me understand the game and make better decisions."
⋆⋆⋆⋆⋆
"I use it before every casino trip – best blackjack training app out there!"
___________________________
Terms: www.bjt.app/terms-of-use
Privacy: www.bjt.app/privacy-policy
Learn exactly when to Hit, Stand, Split, Double or Surrender - and why.
Blackjack 21: Strategy Trainer is your personal guide to basic strategy. It teaches you the fundamentals through real hands and instant feedback
⋄ Practice Real Blackjack Decisions
Hit, Stand, Split, Double or Surrender — train your choices on realistic hands.
⋄ Get Instant Feedback
See if your move matches basic strategy, and understand why it was right or wrong.
⋄ View the Basic Strategy Table
Access a full strategy chart that adapts to your selected house rules.
⋄ Learn to Play Like a Professional
Build confidence and make better decisions through structured practice.
⋄ No Money, No Counting, No Distractions
This is a Blackjack training app, not a game. There’s no simulated or real money, and no card counting involved.
___________________________
What Users Say
⋆⋆⋆⋆⋆
"I finally know when to double or surrender. Love having the strategy table in my pocket."
⋆⋆⋆⋆⋆
"This really helped me understand the game and make better decisions."
⋆⋆⋆⋆⋆
"I use it before every casino trip – best blackjack training app out there!"
___________________________
Terms: www.bjt.app/terms-of-use
Privacy: www.bjt.app/privacy-policy
Latest updates
3.3.0
We’ve implemented under-the-hood optimizations and visual refinements to ensure your strategy training remains smooth and precise. Good luck at the tables!
3.1.5
Store changes
What Blackjack 21: Card Trainer changed on its store page: name, icon, screenshots, price, size, languages, requirements.
App got bigger
44 MB → 72 MB (+65%)
