# Zone 21 vs Block Blast！

The clearest difference is in-app purchases: Zone 21 at none against Block Blast！'s 3. Zone 21 also leads on iOS requirement (12.0 vs 15.0). Block Blast！'s advantage is update cadence (every 3 days vs every 3 months) and ratings volume (2.7M vs 23). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. Block Blast！ sells 3 in-app purchases, starting at $4.99 per 7 days. Zone 21 asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.8 for Zone 21 against 4.9 for Block Blast！. That said, the two scores are not equally well evidenced: Block Blast！ has 2.7M ratings behind it against 23, so its average is the more settled of the two. Written reviews are what separate them: 83% of Zone 21's written reviews are positive against 76% of Block Blast！'s.

Zone 21 ships an update every 3 months, Block Blast！ every 3 days. The most recent releases landed on June 9, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Zone 21 | Block Blast！ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (23 ratings)](https://appshunter.io/ios/app/zone-21-fast-math-solitaire/id1484296990/reviews) | **[4.9 (2.7M ratings)](https://appshunter.io/ios/app/block-blast/id1617391485/reviews)** |
| Number of ratings | 23 | **2.7M** |
| Positive reviews | **83.3% of reviews** | 76.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Every 3 days** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Best chart rank | — | **#8** |
| Size | 155 MB | 194 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 12+ |
| Developer | [CodeCube Brothers Partnership](https://appshunter.io/developer/415118511) | [Hungry Studio](https://appshunter.io/developer/1655290753) |

## What reviewers say

### Zone 21

[App page](https://appshunter.io/ios/app/zone-21-fast-math-solitaire/id1484296990)

A fast-paced card game where players aim to keep their card total between 0 and 21 to score points and win real-world rewards and cash prizes. Compete against others globally in timed multiplayer matches.

**Highlights:** Mathematical card game mechanics, Stay between 0 and 21, Win real cash prizes, Multiplayer challenges, Timed matches, Global leaderboards

**In-app purchases:** none


### Block Blast！

[App page](https://appshunter.io/ios/app/block-blast/id1617391485)

**Currently charting:** #8 Top Free · Casual, #10 Top Free · Puzzle, #14 Top Free · Games, #102 Top Free (US App Store)

Engage your mind with a vibrant block-crushing puzzle game. Solve daily challenges, strategically place colorful cubes on an 8x8 board, and aim for endless high scores. Enjoy satisfying chain reactions and a relaxing yet challenging experience, playable offline.

**Highlights:** Daily puzzle variety, Block puzzle saga, Endless high score hunt, Strategic puzzle gameplay, Adventure mode, Offline fun

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Week Subscribe | $4.99 | per 7 days |
| 1 Month Subscribe | $9.99 | per month |
| 1 Year Subscribe | $49.99 | per year |

**What reviewers like**

- 🚀 Addictive and fun gameplay
- 👍 Great for passing time
- 🎨 Vibrant graphics and animations
- 🧠 Challenges the mind
- 📱 Works offline

**What reviewers complain about**

- 💢 Excessive and intrusive ads
- 🤖 Algorithm appears rigged at higher scores
- 🔋 Drains battery quickly
- 🐛 Occasional glitches and bugs

**Reported bugs**

- Retry button not functioning properly
- Levels resetting unexpectedly
- Blocks not registering properly

**Requested features**

- Option to pay for ad-free experience
- More game modes and level variety
- Ability to rotate/manipulate blocks
- Progression and rewards system


## Frequently asked questions

### Is Zone 21 free?

Zone 21 is free to download, with no in-app purchases.

### Is Block Blast！ free?

Block Blast！ is free to download, with in-app purchases available.

### Which has better reviews, Zone 21 or Block Blast！?

Block Blast！ is rated higher. Zone 21 averages 4.8 out of 5 from 23 ratings, while Block Blast！ averages 4.9 from 2.7M ratings.

### Do Zone 21 or Block Blast！ have ads?

Both Zone 21 and Block Blast！ show ads.

### Which is updated more often, Zone 21 or Block Blast！?

Zone 21 ships an update every 3 months, and Block Blast！ every 3 days. Most recently, Zone 21 was updated on June 9, 2026 and Block Blast！ on September 25, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*