# SPHERE vs Space Outpost

The clearest difference is update cadence: Space Outpost at daily against SPHERE's every 4 months. SPHERE's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 16.4). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SPHERE ships an update every 4 months, Space Outpost daily. The most recent releases landed on October 10, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | SPHERE | Space Outpost |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/space-outpost/id6772625531/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 4 months | **Daily** |
| Monetization | — | Ad-supported |
| Size | 154 MB | 78 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Tomoki Fukushima](https://appshunter.io/developer/1777185003) | [Steven Brown](https://appshunter.io/developer/1896142200) |

## What reviewers say

### SPHERE

[App page](https://appshunter.io/ios/app/sphere-defense/id6737588413)

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is SPHERE free?

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

### Is Space Outpost free?

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

### Do SPHERE or Space Outpost have ads?

Both SPHERE and Space Outpost show ads.

### Which is updated more often, SPHERE or Space Outpost?

SPHERE ships an update every 4 months, and Space Outpost daily. Most recently, SPHERE was updated on October 10, 2026 and Space Outpost on October 24, 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.*