# SUNSATHI SOLAR vs Grid Zero

The clearest difference is update cadence: Grid Zero at weekly against SUNSATHI SOLAR's monthly. On price, ads, in-app purchases and device support there is nothing between them.

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

SUNSATHI SOLAR ships an update monthly, Grid Zero weekly. The most recent releases landed on October 14, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | SUNSATHI SOLAR | Grid Zero |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Size | 37 MB | 55 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [无锡乐伏网络科技有限公司](https://appshunter.io/developer/1197246083) | [Gridzero](https://appshunter.io/developer/1896484252) |

## What reviewers say

### SUNSATHI SOLAR

[App page](https://appshunter.io/ios/app/sunsathi-solar/id6746159158)

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

**In-app purchases:** none


### 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 SUNSATHI SOLAR free?

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

### Is Grid Zero free?

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

### Do SUNSATHI SOLAR or Grid Zero have ads?

Neither SUNSATHI SOLAR nor Grid Zero shows ads.

### Which is updated more often, SUNSATHI SOLAR or Grid Zero?

SUNSATHI SOLAR ships an update monthly, and Grid Zero weekly. Most recently, SUNSATHI SOLAR was updated on October 14, 2026 and Grid Zero on October 10, 2026.

---

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