# Grace Solar vs Zero Carbon

The clearest difference is update cadence: Grace Solar at fortnightly against Zero Carbon'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.

Grace Solar ships an update fortnightly, Zero Carbon monthly. The most recent releases landed on October 7, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Grace Solar | Zero Carbon |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Monthly |
| Size | 71 MB | 22 MB |
| Requires iOS | 11.0 | 11.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [AHASOLAR TECHNOLOGIES LIMITED](https://appshunter.io/developer/1632224285) | [TheTowerTech](https://appshunter.io/developer/1259751444) |

## What reviewers say

### Grace Solar

[App page](https://appshunter.io/ios/app/grace-solar/id1489691070)

**In-app purchases:** none


### Zero Carbon

[App page](https://appshunter.io/ios/app/zero-carbon-connect/id6447286723)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Grace Solar free?

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

### Is Zero Carbon free?

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

### Do Grace Solar or Zero Carbon have ads?

Neither Grace Solar nor Zero Carbon shows ads.

### Which is updated more often, Grace Solar or Zero Carbon?

Grace Solar ships an update fortnightly, and Zero Carbon monthly. Most recently, Grace Solar was updated on October 7, 2026 and Zero Carbon on October 16, 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.*