# Zap Numbers！ vs Stack Tower

The clearest difference is in-app purchases: Zap Numbers！ at none against Stack Tower's 1. Zap Numbers！ also leads on update cadence (every 2 weeks vs every 5 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Stack Tower sells 1 one-off in-app purchase. Zap Numbers！ asks for nothing beyond the download.

Zap Numbers！ ships an update every 2 weeks, Stack Tower every 5 months. The most recent releases landed on October 9, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Zap Numbers！ | Stack Tower |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/stack-tower-block-stacker/id6760201122/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 2 weeks** | Every 5 months |
| Monetization | — | Free with in-app purchases |
| Size | 162 MB | 5 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Chunk Crank](https://appshunter.io/developer/1877349518) | [Jenesh Napit](https://appshunter.io/developer/1742677233) |

## What reviewers say

### Zap Numbers！

[App page](https://appshunter.io/ios/app/zap-numbers/id6759194751)

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

**In-app purchases:** none


### Stack Tower

[App page](https://appshunter.io/ios/app/stack-tower-block-stacker/id6760201122)

Tap to stack blocks with precision and build the tallest tower possible. Perfect placements are key to maintaining width and boosting your score. Compete in daily challenges and real-time multiplayer matches.

**Highlights:** Precision block stacking, Daily challenges with unique levels, Real-time multiplayer battles, Game Center leaderboards, Unlockable skins and achievements, Satisfying sound and haptic feedback

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Upgrade | $0.99 | one-time |


## Frequently asked questions

### Is Zap Numbers！ free?

Zap Numbers！ is free to download, with no in-app purchases.

### Is Stack Tower free?

Stack Tower is free to download, with in-app purchases available.

### Do Zap Numbers！ or Stack Tower have ads?

Both Zap Numbers！ and Stack Tower show ads.

### Which is updated more often, Zap Numbers！ or Stack Tower?

Zap Numbers！ ships an update every 2 weeks, and Stack Tower every 5 months. Most recently, Zap Numbers！ was updated on October 9, 2026 and Stack Tower on October 6, 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.*