# Zero21 Card Game — A game with solitaire card

> A number puzzle game where players aim to keep a running total between 0 and 21. (iPhone/iPad app by Le Nhung.)

- Source: https://appshunter.io/ios/app/zero21-card-game/id1550265606 (this page in markdown: same URL + `.md`)
- Developer: [Le Nhung](https://appshunter.io/developer/1436505077)
- Category: Games, Entertainment, Board, Card
- Price: Free
- Rating: 4.00/5 from 3 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.6 · 58 MB
- Languages: English, Chinese
- Released: 2021-01-22
- Data updated: 2026-06-11
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/zero21-card-game/id1550265606/reviews.md

## What is Zero21 Card Game?

"ZERO21 CARD GAME

Zero21 Card Game is a number games with solitaire card.
It is fun, relax but helps to train your brain.

***HOW TO PLAY***
The game rule is simple: Try to stay between 0 and 21.
- Collect the number card on the board
- Choose the right one to keep the sum lower than 21 and greater than 0
- Use the power up cards to help you solve this math game

***FEATURES***
- PICK YOUR STYLE: Many unique stylish card collections for your choice to play to keep things fresh everyday.
- AMAZE IN EVERY LEVEL: Diversity card layouts at each level let the game more interesting.
- FINISH DAILY CHALLENGE to unlock new card collections.
- Golden card keeps your current number at the golden one.
- See the next number with forseen card.
- Hold button help to keep the card for the next move.
- Remove the unused card with Delete button.

 You should not miss this mathgame because it is TOTALLY FREE  and help you BE SMARTER everyday!

## Key features

- Keep score between 0 and 21
- Collect number cards
- Use power-up cards
- Unlock new card collections
- Daily challenges
- Diverse card layouts

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/zero21-card-game/id1550265606/reviews.md

### 3/5 — Fun..But…..

*2021-05-14*

This is very fun game.  But there is no way to get rid of ads. And you have to watch a 30 sec ad to use certain cards and after each game. It gets to be too much ads for how short a game is.  If you could pay to disable ads that would be better and more people would do it.

## Frequently asked questions about Zero21 Card Game

### What is the main objective of Zero21 Card Game?

The main objective is to collect number cards on the board and strategically choose them to keep your running total between 0 and 21. Power-up cards can assist you in achieving this goal.

### How do I play Zero21 Card Game?

You play by collecting number cards on the board, aiming to keep the sum of collected cards greater than 0 and less than 21. Special cards like Golden, Foreseen, Hold, and Delete offer strategic advantages.

### Does Zero21 Card Game have ads?

Yes, Zero21 Card Game contains advertisements. This allows the game to be offered to players for free.

### Can I customize the look of Zero21 Card Game?

Yes, the game offers many unique and stylish card collections for you to choose from, allowing you to personalize your gameplay experience.

### Is Zero21 Card Game available offline?

The provided data does not specify if Zero21 Card Game can be played offline. However, many card games of this nature are playable without an internet connection.

### What devices is Zero21 Card Game compatible with?

Zero21 Card Game is compatible with iPhones, iPads, and iPods. It is designed for the iOS platform.

### How often is Zero21 Card Game updated?

The latest version of Zero21 Card Game is 1.0.1, last updated on May 18, 2026. This indicates a recent update, though the frequency of future updates is not specified.

### What is the age rating for Zero21 Card Game?

Zero21 Card Game has an age rating of 4+, making it suitable for young children and up.

## Version history (last 2 releases)

### 1.0.1 — 2026-05-18

- Fix some minor bugs.
- Improve UX/UI.
- Improve performance.

### 1.0.0 — 2021-01-22

No release notes.

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## More apps by Le Nhung

- [Galaxy Combat: Space shooter](https://appshunter.io/ios/app/galaxy-combat-space-shooter/id1436505078)
- [Chicken Shooter: Space shoting](https://appshunter.io/ios/app/chicken-shooter-space-shoting/id1440565379)
- [Domino Merge Block Puzzle](https://appshunter.io/ios/app/domino-merge-block-puzzle/id1444847537)
- [Woody Puzzle Luxury+](https://appshunter.io/ios/app/woody-puzzle-luxury-plus/id1446387975)
- [Block Jewel: Tentrix Puzzle](https://appshunter.io/ios/app/block-jewel-tentrix-puzzle/id1448356918)
- [Candy Slide Puzzle: Block Drop](https://appshunter.io/ios/app/candy-slide-puzzle-block-drop/id1458575861)

All apps by Le Nhung: https://appshunter.io/developer/1436505077

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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 2026-06-11.*