# Void_TD vs Perimeter Zero

The clearest difference is in-app purchases: Void_TD at none against Perimeter Zero's 1. Void_TD also leads on ads (none vs shown) and iOS requirement (12.0 vs 16.0). Perimeter Zero's advantage is update cadence (every 2 days vs fortnightly). On price and device support there is nothing between them.

Both are free to download. Perimeter Zero sells 1 one-off in-app purchase. Void_TD asks for nothing beyond the download.

Void_TD ships an update fortnightly, Perimeter Zero every 2 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | Void_TD | Perimeter Zero |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (14 ratings)](https://appshunter.io/ios/app/void-td/id6762560273/reviews)** | — |
| Number of ratings | **14** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | **Every 2 days** |
| Monetization | Free | — |
| Size | 93 MB | 11 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 9+ | 9+ |
| Developer | [Ryan O'Donnell](https://appshunter.io/developer/1894676963) | [Hyacinthe Loua](https://appshunter.io/developer/6777148473) |

## What reviewers say

### Void_TD

[App page](https://appshunter.io/ios/app/void-td/id6762560273)

Defend your base against waves of enemies in this sci-fi tower defense game. Strategically place and upgrade towers, customize your loadout, and face increasingly difficult challenges. Unlock new modes and cosmetic options as you progress.

**Highlights:** 6 unique tower types with 3 upgrade levels, 6 enemy types including boss variants, 20 campaign waves and procedural endless mode, Customizable tower loadouts and cosmetic skins, 3 difficulty levels, High score tracking

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

**In-app purchases:** none


### Perimeter Zero

[App page](https://appshunter.io/ios/app/perimeter-zero/id6786819667)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PerimeterZero Premium | $2.99 | one-time |


## Frequently asked questions

### Is Void_TD free?

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

### Is Perimeter Zero free?

Perimeter Zero is free to download, with in-app purchases available.

### Do Void_TD or Perimeter Zero have ads?

Perimeter Zero shows ads; Void_TD does not.

### Which is updated more often, Void_TD or Perimeter Zero?

Void_TD ships an update fortnightly, and Perimeter Zero every 2 days. Most recently, Void_TD was updated on October 31, 2026 and Perimeter Zero 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.*