# TowerStacker Arcade vs Kon21

The clearest difference is in-app purchases: Kon21 at none against TowerStacker Arcade's 2. Kon21 also leads on update cadence (every 4 days vs every 3 weeks). TowerStacker Arcade's advantage is device support (5 vs 3) and iOS requirement (17 vs 26.2). On price and ads there is nothing between them.

Both are free to download. TowerStacker Arcade sells 2 one-off in-app purchases. Kon21 asks for nothing beyond the download.

TowerStacker Arcade ships an update every 3 weeks, Kon21 every 4 days. The most recent releases landed on October 6, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | TowerStacker Arcade | Kon21 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/kon21/id6760956783/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Monetization | — | Free |
| Size | 28 MB | 19 MB |
| Requires iOS | **17** | 26.2 |
| Devices | **iPhone, iPad, Mac, Apple TV, Apple Watch** | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [ANTONIO CALISTO PATO](https://appshunter.io/developer/1866684319) | [RetroApps LLC](https://appshunter.io/developer/1845420719) |

## What reviewers say

### TowerStacker Arcade

[App page](https://appshunter.io/ios/app/towerstacker-arcade/id6757407028)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Full Game | $2.99 | one-time |
| Remove Ads Forever | $2.99 | one-time |


### Kon21

[App page](https://appshunter.io/ios/app/kon21/id6760956783)

Embark on a cosmic adventure to restore balance to chaotic zodiac realms. Battle evolving creatures using a unique blackjack-inspired card system and master the art of 21 to unleash powerful attacks. Explore pixel-crafted worlds with a retro aesthetic.

**Highlights:** Explore living zodiac realms, Conway-powered evolving creatures, Strategic blackjack-inspired combat, Master the art of 21, Retro pixel aesthetic

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is TowerStacker Arcade free?

TowerStacker Arcade is free to download, with in-app purchases available.

### Is Kon21 free?

Kon21 is free to download, with no in-app purchases.

### Do TowerStacker Arcade or Kon21 have ads?

Neither TowerStacker Arcade nor Kon21 shows ads.

### Which is updated more often, TowerStacker Arcade or Kon21?

TowerStacker Arcade ships an update every 3 weeks, and Kon21 every 4 days. Most recently, TowerStacker Arcade was updated on October 6, 2026 and Kon21 on October 7, 2026.

---

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