Comparison

Advanced 21 Blackjack vs Card Adder 21

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Advanced 21 Blackjack

Experience a realistic blackjack simulation with extensive customization options. Practice strategies, build skills, and unlock new graphics as you advance through tables. This free game offers thousands of hours of strategic play and fun.

Highlights
  • Customizable table rules
  • Adjustable deck shoe size
  • Multiple seat positions
  • Strategy suggestions
  • Table advancement system
  • Unlockable graphics
  • Simulated casino environment
Features
Read full description

Advanced 21 Blackjack is the most realistic, free way to play twenty-one without setting foot in a casino. With customizable table rules, graphics, and play styles, this blackjack game provides thousands of hours of playtime, strategy building, and fun! Advanced 21 Blackjack puts you in complete control of your play experience, including: - Deck shoe size (1 to 8 decks) - Blackjack payout ratio - Surrender options - Rules for splitting after doubling down - Dealer behavior on soft 17 - Pay on push - Automatic-winner Charlie rules Make the game your own while practicing new betting strategies, table positioning, and basic blackjack strategy: - Play at up to 6 seat positions simultaneously - Have computer players randomly come and go, simulating a real casino experience - Specify computer player positions if you wish, or turn them off completely - Set the gameplay rules for auto-rebet, auto-stand, basic blackjack strategy suggestions, auto-decline for insurance, animation displays, and much more! Continue to hone your skills with Advanced 21 Blackjack through table advancement, starting as “The Rookie” and earning your way to the “The Whale” table. Earn club points by completing achievements to unlock new graphics, including: - Poker chip sets - Card faces - Card backs - Table prints and bet-box designs - Table pad colors and font textures Want to make suggestions on Advanced 21 Blackjack or report an issue? Contact us at advanced21@basement.software. Thanks! Please Note: Advanced 21 Blackjack is free to download and play, however, some options are available through in-app purchases. If you do not want to use this feature, please set up password protection or disable in-app purchases within the app store. A network connection is required to play Advanced 21 Blackjack. This free blackjack app is intended for adult audiences and does not offer any real money gambling or any opportunities to win real money or prices. Any success within Advanced 21 Blackjack does not imply any future success in real money casinos or gambling. Gambling addiction is real. If you or someone you know may be addicted to gambling, call or visit your local gambling helpline.

About

Card Adder 21

Enhance your mental math skills by tracking a running total as cards are dealt. Progress through increasingly challenging levels with a timed element. The game offers progress tracking and is designed to make counting enjoyable.

Highlights
  • Progressive difficulty levels
  • Timed challenges
  • Running total tracking
  • Progress tracking
  • Card dealing gameplay
Features
Read full description

HOW TO PLAY Cards are dealt one by one. Keep track of the running total to progress through levels. What level can you reach? FEATURES • Progressive difficulty levels with a timed challenge • Progress tracking • Ads are ONLY shown on losing segments COMING SOON • Game Center high scores and community records • Personalized progress tracking Perfect for anyone wanting to improve their mental adding and counting skills. Download Card Adder 21 and make counting fun.

Screenshots

Advanced 21 Blackjack4 screens
Card Adder 214 screens

Verdict

The call

The clearest difference is update cadence: Card Adder 21 at every 5 days against Advanced 21 Blackjack's every 3 months. Card Adder 21 also leads on rating (5.0 vs 4.6) and monetization model (free vs free with in-app purchases). Advanced 21 Blackjack's advantage is ratings volume (214 vs 1). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Advanced 21 Blackjack sells 10 one-off in-app purchases and Card Adder 21 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Card Adder 21 holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Advanced 21 Blackjack has 214 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Advanced 21 Blackjack ships an update every 3 months, Card Adder 21 every 5 days. The most recent releases landed on October 24, 2026 and October 9, 2026 respectively.

Scorecard5 real differences · 5 level
Advanced 21 Blackjack versus Card Adder 21: the parameters behind the verdict, then further details
ParameterAdvanced 21 BlackjackCard Adder 21
PriceFreeFree
Rating4.6 (214 ratings)5.0 (1 ratings) — better
Positive reviews84.1% of reviews—
Number of ratings214 — better1
Update frequencyEvery 3 monthsEvery 5 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size180 MB79 MB
Age rating17+4+
DeveloperBasement Software LLCDot Business Integrated Solutions

Customer experience

Advanced 21 Blackjack

All ratings215 ratings
Positive91.2%
Neutral4.2%
Negative4.7%
Written reviews63 reviews
Positive84.1%
Neutral6.3%
Negative9.5%

Card Adder 21

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Advanced 21 Blackjack

Reported bugs

3 issues
  • Reset function does not work
  • Persistent bug causing dealer to pull excessive 5-6 card 21s
  • Chip purchase prompts after significant losses

Requested features

8 requests
  • Card counting practice mode
  • Offline/airplane mode support
  • Max bet button for convenience
  • Vegas game variations (free bet, side bets)
  • Higher chip rewards after going broke
Show 3 more
  • Ability to disable playing aids for realism
  • Back counting option
  • Negative true count avoidance

Card Adder 21

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

Advanced 21 Blackjack

One-time10
  • Dogs Card Backs$1.99
  • Flowers Card Backs$1.99
  • Pile of Club Points$1.99
Show 7 more
  • Space Theme$4.99
  • Ocean Theme$4.99
  • Bag of Club Points$4.99
  • Small Box of Club Points$9.99
  • Box of Club Points$24.99
  • Big Box of Club Points$49.99
  • Huge Box of Club Points$99.99
1 purchases

Card Adder 21

One-time1
  • Card Adder 21 Pro Lifetime$4.99

Questions

Is Advanced 21 Blackjack free?
Advanced 21 Blackjack is free to download, with in-app purchases available.
Is Card Adder 21 free?
Card Adder 21 is free to download, with in-app purchases available.
Which has better reviews, Advanced 21 Blackjack or Card Adder 21?
Card Adder 21 is rated higher. Advanced 21 Blackjack averages 4.6 out of 5 from 214 ratings, while Card Adder 21 averages 5.0 from 1 ratings.
Do Advanced 21 Blackjack or Card Adder 21 have ads?
Neither Advanced 21 Blackjack nor Card Adder 21 shows ads.
Which is updated more often, Advanced 21 Blackjack or Card Adder 21?
Advanced 21 Blackjack ships an update every 3 months, and Card Adder 21 every 5 days. Most recently, Advanced 21 Blackjack was updated on October 24, 2026 and Card Adder 21 on October 9, 2026.

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