# EDGE21 vs Block Defense

The clearest difference is ads: EDGE21 at none against Block Defense's shown. EDGE21 also leads on update cadence (fortnightly vs every 2 months). Block Defense's advantage is iOS requirement (13.0 vs 15.1). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

EDGE21 ships an update fortnightly, Block Defense every 2 months. Both last shipped on October 31, 2026.

## The numbers

| Metric | EDGE21 | Block Defense |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/edge21/id6757775188/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Free | — |
| Size | 24 MB | 107 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mark Baumrind](https://appshunter.io/developer/1868868237) | [Zorvyn Myxthirn Falkthorpe](https://appshunter.io/developer/6792965832) |

## What reviewers say

### EDGE21

[App page](https://appshunter.io/ios/app/edge21/id6757775188)

Master blackjack strategy with this educational tool. Learn basic strategy, practice card counting, and identify mistakes with detailed explanations and engaging game modes. Designed for entertainment and skill improvement.

**Highlights:** Learn Basic Strategy, Speedrun Mode, Boss Hand Mode, Card Counting Practice, Mistake Identification, Detailed Explanations

**Features:** macOS Compatibility

**In-app purchases:** none


### Block Defense

[App page](https://appshunter.io/ios/app/block-defense-tower-war/id6792978108)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is EDGE21 free?

EDGE21 is free to download, with no in-app purchases.

### Is Block Defense free?

Block Defense is free to download, with no in-app purchases.

### Do EDGE21 or Block Defense have ads?

Block Defense shows ads; EDGE21 does not.

### Which is updated more often, EDGE21 or Block Defense?

EDGE21 ships an update fortnightly, and Block Defense every 2 months. Most recently, EDGE21 was updated on October 31, 2026 and Block Defense on October 31, 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.*