Blackjack Advisor vs Card Adder 21
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Blackjack Advisor
This application offers real-time guidance for Blackjack players, suggesting optimal moves like standing, hitting, splitting, or doubling based on dealer and player cards. It aims to improve your odds at the table with no advertisements or subscriptions required.
- Real-time strategy suggestions
- Stand, hit, split, double guidance
- Dealer and player card input
- Improves odds at Blackjack
- No ads
- No subscription
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Provides suggestions on when to stand, hit, split or double. Improves your odds at the Blackjack table. - no ads - no subscription - use immediately - the in-app purchase is just asking you for a voluntary, one-time tip for the developer. Select the card that the dealer has, then select the cards that you have and this app will advise you what to do. Be careful: even if you play perfectly, house always has an edge. This app is created with care but may contain bugs and errors. Use at your own risk!
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.
- Progressive difficulty levels
- Timed challenges
- Running total tracking
- Progress tracking
- Card dealing gameplay
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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
Verdict
The clearest difference is monetization model: Card Adder 21 at free against Blackjack Advisor's free with in-app purchases. Card Adder 21 also leads on update cadence (every 5 days vs every 3 weeks) and device support (3 vs 1). Blackjack Advisor's advantage is ratings volume (5 vs 1). On price, rating, ads and in-app purchases 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
Both are free to download. Blackjack Advisor sells 2 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.
On the App Store both sit at effectively the same score — 5.0 for Blackjack Advisor against 5.0 for Card Adder 21. That said, the two scores are not equally well evidenced: Blackjack Advisor has 5 ratings behind it against 1, so its average is the more settled of the two.
Blackjack Advisor ships an update every 3 weeks, Card Adder 21 every 5 days. The most recent releases landed on September 15, 2026 and September 7, 2026 respectively.
| Parameter | Blackjack Advisor | Card Adder 21 |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (5 ratings) | 5.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 5 — better | 1 |
| Update frequency | Every 3 weeks | Every 5 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 79 MB |
| Age rating | 17+ | 4+ |
| Developer | Research and Market Insights B.V. | Dot Business Integrated Solutions |
Customer experience
Blackjack Advisor
Card Adder 21
In-app purchases
Blackjack Advisor
- One-time Generous Tip$3.99
- One-time Amazing Tip$6.99
Card Adder 21
- Card Adder 21 Pro Lifetime$4.99
Questions
Is Blackjack Advisor free?
Is Card Adder 21 free?
Which has better reviews, Blackjack Advisor or Card Adder 21?
Do Blackjack Advisor or Card Adder 21 have ads?
Which is updated more often, Blackjack Advisor or Card Adder 21?
Other comparisons
