# SPHERE vs Grid Defense

The clearest difference is in-app purchases: SPHERE at none against Grid Defense's 1. SPHERE also leads on iOS requirement (13.0 vs 15.0). Grid Defense's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 4 months). On price and device support there is nothing between them.

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

SPHERE ships an update every 4 months, Grid Defense every 2 weeks. Both last shipped on October 25, 2026.

## The numbers

| Metric | SPHERE | Grid Defense |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Size | 154 MB | 10 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Tomoki Fukushima](https://appshunter.io/developer/1777185003) | [Dimitar Porkov](https://appshunter.io/developer/6790099306) |

## What reviewers say

### SPHERE

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

**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 SPHERE free?

SPHERE 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 SPHERE or Grid Defense have ads?

SPHERE shows ads; Grid Defense does not.

### Which is updated more often, SPHERE or Grid Defense?

SPHERE ships an update every 4 months, and Grid Defense every 2 weeks. Most recently, SPHERE was updated on October 25, 2026 and Grid Defense on October 25, 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.*