Card Adder 21 vs AP Blackjack Trainer
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
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.
AP Blackjack Trainer
Master blackjack strategy and card counting with this focused training tool. Practice basic strategy, HILO counting, and advanced techniques. Features customizable tables, a rank-up system, and optional AI coaching for a comprehensive learning experience.
- Basic Strategy Training
- HILO Card Counting
- Customizable Strategy Tables
- Running Count Tracking
- Rank Up System
- AI Coach (Subscription)
- True Count (Subscription)
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AP Blackjack Trainer is the ultimate tool for mastering Basic Strategy and HILO Card Counting. Made by a solo developer and card counter. Whether you're just starting or looking to sharpen your game, this app is built to make blackjack training focused and easy for all. FEATURES Customizable Strategy Tables & Rules Pairs, Soft Hands, and Hard Hands Running Count Rank Up System & Profile Icons Smart Trainer - Variable Difficulty & Missed Hands Tracking (requires paid subscription). AI Coach - Powered by OpenAI (requires paid subscription). True Count (requires paid subscription). Deviations (requires paid subscription). Bet Spread (requires paid subscription). DISCLAIMER This app is an educational tool designed to help you learn blackjack strategy, not a gambling or real-money card counting app. There is no real betting in this trainer so you can practice and improve your skills without any financial risk. Success within the app does not guarantee success in actual casino play. Our goal is to teach correct decision making based on probability and data—not to promise wins. While we don't encourage real-money gambling, we support informed, responsible decisions for those who do. If you choose to gamble, please do so responsibly. For more information visit anklebully.org/privacy-policy anklebully.org/terms-of-service.
Screenshots
Verdict
The clearest difference is monetization model: Card Adder 21 at free against AP Blackjack Trainer's free with in-app purchases. AP Blackjack Trainer's advantage is update cadence (daily vs every 5 days) and ratings volume (16 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. Card Adder 21 sells 1 one-off in-app purchase and AP Blackjack Trainer sells 1 in-app purchase, starting at $0.99 per month. 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 Card Adder 21 against 5.0 for AP Blackjack Trainer. That said, the two scores are not equally well evidenced: AP Blackjack Trainer has 16 ratings behind it against 1, so its average is the more settled of the two.
Card Adder 21 ships an update every 5 days, AP Blackjack Trainer daily. The most recent releases landed on October 9, 2026 and October 24, 2026 respectively.
| Parameter | Card Adder 21 | AP Blackjack Trainer |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (16 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 1 | 16 — better |
| Update frequency | Every 5 days | Daily — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 12.2 — better |
| Further details — not scored | ||
| Size | 79 MB | 274 MB |
| Age rating | 4+ | 17+ |
| Developer | Dot Business Integrated Solutions | Ankle Bully Games |
Customer experience
Card Adder 21
AP Blackjack Trainer
In-app purchases
Card Adder 21
- Card Adder 21 Pro Lifetime$4.99
AP Blackjack Trainer
- AdvantageBlackjack+ Monthly$0.991 Month
Questions
Is Card Adder 21 free?
Is AP Blackjack Trainer free?
Which has better reviews, Card Adder 21 or AP Blackjack Trainer?
Do Card Adder 21 or AP Blackjack Trainer have ads?
Which is updated more often, Card Adder 21 or AP Blackjack Trainer?
Other comparisons
