# Blackjack Online: 21 Trainer — Card Counting Strategy Board

> Free offline and online Blackjack 21 card game simulation against a dealer. (iPhone/iPad app by Beijing ZJCYOU Technology Co., Ltd.)

- Source: https://appshunter.io/ios/app/blackjack-online-21-trainer/id1599427410 (this page in markdown: same URL + `.md`)
- Developer: [Beijing ZJCYOU Technology Co., Ltd](https://appshunter.io/developer/1126239607)
- Category: Games, Card
- Price: Free with in-app purchases
- Rating: 3.00/5 from 2 App Store ratings · 1 written reviews indexed
- Age rating: 17+
- Requires: iOS 12.0 · 192 MB
- Languages: Canadian English, French (France), German (Germany), Italian, Japanese, Korean, European Portuguese, Russian, Chinese (Simplified, China), European Spanish and 1 more
- Released: 2022-01-05
- Data updated: 2026-08-14
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/blackjack-online-21-trainer/id1599427410/reviews.md

## What is Blackjack Online?

Blackjack 21 is one of the world’s most famous card games.
This is a free authentic casino Blackjack gambling game, also known as twenty-one or 21, that you can play against the dealer, play fair blackjack hands every time! This free app does not offer real money gambling or any opportunities to win real money, prizes and gifts. Success within this free game does not imply future success at real money gambling.

FEATURE
Play the game every day to get free chips!
Train your Blackjack 21 strategies, honing your abilities.
Spin lucky and royal wheel and get extra chips to win at blackjack online!
Fair hands guaranteed gives you the best and fairest blackjack experience! 
Get straight into the action, use our free blackjack app without registering.
Participate in limited time events and get free chips!
Easy to play 100% fun addictive and challenging game.

Blackjack 21 is one of the world’s most famous casinos card games. Play the best app on the app store, just jump right in and play it free! Become Vegas’ biggest fish, enjoy the fun, DownLoad Now

## Key features

- Play against the dealer
- Daily free chips
- Lucky wheel for extra chips
- Limited-time events
- Fair hands guaranteed
- No registration required
- Offline and online play

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 320000000 chips | $99.99 | one-time |
| 150000000 chips | $49.99 | one-time |
| 32000000 chips | $19.99 | one-time |
| 12800000 chips | $9.99 | one-time |
| 6800000 chips | $5.99 | one-time |
| 2900000 chips | $2.99 | one-time |
| LUCKY WHEEL | $2.99 | one-time |
| EXPLOSIVE DEAL | $5.99 | one-time |
| COIN BOOM | $1.99 | one-time |
| SURPRISED | $2.99 | one-time |
| BANKRUPTCY RELIEF PACKAGE | $0.99 | one-time |
| 1ST TIME SPECIAL OFFER | $0.99 | one-time |
| EXCLUSIVE FOR YOU | $3.99 | one-time |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/blackjack-online-21-trainer/id1599427410/reviews.md

### 1/5 — Blackjack

*2024-11-10*

It says dealer hits on soft 17 but it still hits. It’s just scams you out of your coins if you don’t know the rules don’t publish a game like this smh. Just stupid

## Frequently asked questions about Blackjack Online

### What is Blackjack 21 Classic Card Game?

Blackjack 21 Classic Card Game is a free simulation of the popular casino card game, also known as twenty-one. It allows players to practice strategies against a dealer without using real money.

### Can I play Blackjack 21 Classic Card Game offline?

Yes, the app offers an offline mode, allowing you to play the game without an internet connection. This provides flexibility for practicing your skills anytime, anywhere.

### Does Blackjack 21 Classic Card Game offer real money gambling?

No, this app explicitly states that it does not offer real money gambling or opportunities to win real money, prizes, or gifts. Success in the game does not guarantee future success in real money gambling.

### How can I get free chips in Blackjack 21 Classic Card Game?

You can get free chips by playing the game daily, participating in limited-time events, and spinning the lucky and royal wheel. These features are designed to provide continuous gameplay without requiring purchases.

### Does Blackjack 21 Classic Card Game have ads?

Yes, Blackjack 21 Classic Card Game contains advertisements. These ads are part of the free-to-play model and help support the development and maintenance of the game.

### What is the age rating for Blackjack 21 Classic Card Game?

Blackjack 21 Classic Card Game has an age rating of 17+. This is likely due to its simulated gambling theme, even though no real money is involved.

### How often is Blackjack 21 Classic Card Game updated?

The latest version, 2.7, was released on 2025-10-10. While specific update frequency isn't detailed, this indicates ongoing development and support for the application.

### What devices can I play Blackjack 21 Classic Card Game on?

Blackjack 21 Classic Card Game is supported on iPhone, iPad, and iPod devices. This ensures a wide range of Apple users can enjoy the game.

## Version history (last 5 releases)

### 2.8 — 2026-07-07

Fix game bugs

### 2.7 — 2025-10-10

Fix game bugs
Novice guided optimization

### 2.6 — 2024-12-28

Increase betting guidance
Nickname optimization
Novice guided optimization
Promotion Competition Optimization
Task module function optimization
Card package module function optimization

### 2.5 — 2023-12-01

Optimize rules for novice bootstrapping
Optimize the main interface layout
Optimize the treasure box module
Adjust the challenge rules
Increase the number of levels in the obstacle course
Adjust the rules of the promotion competition
Add new avatar

### 2.4 — 2023-10-10

Active module unlock level adjustment
Task module function optimization
Card package module function optimization
Scratch-off features optimization
Novice guided optimization
Added Lucky Treasure module
Combat experience optimization

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## More apps by Beijing ZJCYOU Technology Co., Ltd

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- [Spades - offline card games.](https://appshunter.io/ios/app/spades-offline-card-games/id1556166091)

All apps by Beijing ZJCYOU Technology Co., Ltd: https://appshunter.io/developer/1126239607

## Related topics

[house of blackjack 21](https://appshunter.io/ios/topics/house-of-blackjack-21)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-14.*