# Space Outpost vs Grid Defense

The clearest difference is in-app purchases: Space Outpost at none against Grid Defense's 1. Space Outpost also leads on update cadence (daily vs every 2 weeks). Grid Defense's advantage is ads (none vs shown) and device support (3 vs 1). On price and iOS requirement there is nothing between them.

Both are free to download. Grid Defense sells 1 one-off in-app purchase. Space Outpost asks for nothing beyond the download.

Space Outpost ships an update daily, Grid Defense every 2 weeks. The most recent releases landed on October 10, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Space Outpost | Grid Defense |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/space-outpost/id6772625531/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Daily** | Every 2 weeks |
| Monetization | Ad-supported | — |
| Size | 78 MB | 10 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 12+ | 9+ |
| Developer | [Steven Brown](https://appshunter.io/developer/1896142200) | [Dimitar Porkov](https://appshunter.io/developer/6790099306) |

## What reviewers say

### Space Outpost

[App page](https://appshunter.io/ios/app/space-outpost/id6772625531)

Defend your outpost against relentless alien hordes in this sci-fi tower defense game. Strategically build and upgrade defensive towers, deploy mobile units, and utilize powerful orbital strikes to save the sun. Play offline and one-handed.

**Highlights:** Campaign across unique planets, Diverse tower and unit types, Mobile strike units and orbital powerups, Multiple enemy types and bosses, Classic and Sudden Death game modes, Offline and one-handed play, Unlockable towers, units, and powerups

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

**In-app purchases:** none


### Grid Defense

[App page](https://appshunter.io/ios/app/grid-defense/id6790099304)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Game Unlock | $1.99 | one-time |


## Frequently asked questions

### Is Space Outpost free?

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

### Is Grid Defense free?

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

### Do Space Outpost or Grid Defense have ads?

Space Outpost shows ads; Grid Defense does not.

### Which is updated more often, Space Outpost or Grid Defense?

Space Outpost ships an update daily, and Grid Defense every 2 weeks. Most recently, Space Outpost was updated on October 10, 2026 and Grid Defense on October 12, 2026.

---

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