# Home Solar System vs Grid Zero

The clearest difference is in-app purchases: Grid Zero at none against Home Solar System's 3. Grid Zero also leads on iOS requirement (15.1 vs 17.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Home Solar System sells 3 in-app purchases, starting at $0.99 per 7 days. Grid Zero asks for nothing beyond the download.

Home Solar System ships an update every 4 days, Grid Zero weekly. The most recent releases landed on October 19, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Home Solar System | Grid Zero |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Weekly |
| Size | 11 MB | 55 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Savio Colombo](https://appshunter.io/developer/1840266069) | [Gridzero](https://appshunter.io/developer/1896484252) |

## What reviewers say

### Home Solar System

[App page](https://appshunter.io/ios/app/home-solar-system/id6763965089)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $0.99 | per 7 days |
| Monthly Subscription | $4.99 | per month |
| Yearly Subscription | $39.99 | per year |


### Grid Zero

[App page](https://appshunter.io/ios/app/grid-zero/id6767530347)

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

**In-app purchases:** none


## Frequently asked questions

### Is Home Solar System free?

Home Solar System is free to download, with in-app purchases available.

### Is Grid Zero free?

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

### Do Home Solar System or Grid Zero have ads?

Neither Home Solar System nor Grid Zero shows ads.

### Which is updated more often, Home Solar System or Grid Zero?

Home Solar System ships an update every 4 days, and Grid Zero weekly. Most recently, Home Solar System was updated on October 19, 2026 and Grid Zero on October 10, 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.*