# Voltline vs Void_TD

The clearest difference is in-app purchases: Void_TD at none against Voltline's 1. Void_TD also leads on iOS requirement (12.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

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

Voltline ships an update every 4 weeks, Void_TD fortnightly. The most recent releases landed on October 13, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Voltline | Void_TD |
| --- | --- | --- |
| 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 | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Fortnightly** |
| Monetization | — | Free |
| Size | 13 MB | 93 MB |
| Requires iOS | 17.0 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 9+ | 9+ |
| Developer | [Olof Petterson](https://appshunter.io/developer/1808256024) | [Ryan O'Donnell](https://appshunter.io/developer/1894676963) |

## What reviewers say

### Voltline

[App page](https://appshunter.io/ios/app/voltline-tower-defense/id6760507113)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Voltline PRO | $2.99 | one-time |


### 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


## Frequently asked questions

### Is Voltline free?

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

### Is Void_TD free?

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

### Do Voltline or Void_TD have ads?

Neither Voltline nor Void_TD shows ads.

### Which is updated more often, Voltline or Void_TD?

Voltline ships an update every 4 weeks, and Void_TD fortnightly. Most recently, Voltline was updated on October 13, 2026 and Void_TD on October 2, 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.*