# FireD vs ZERO CARBON TH

The clearest difference is iOS requirement: ZERO CARBON TH at 13.0 against FireD's 15.1. On price, update cadence, 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.

FireD ships an update every 2 weeks, ZERO CARBON TH every 3 weeks. The most recent releases landed on October 30, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | FireD | ZERO CARBON TH |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Size | 63 MB | 41 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Chakrit Chotamonsak](https://appshunter.io/developer/1208089430) | [Thailand Greenhouse Gas Management Organization](https://appshunter.io/developer/938564036) |

## What reviewers say

### FireD

[App page](https://appshunter.io/ios/app/fired/id1567748564)

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

**In-app purchases:** none


### ZERO CARBON TH

[App page](https://appshunter.io/ios/app/zero-carbon-th/id6468645997)

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

**In-app purchases:** none


## Frequently asked questions

### Is FireD free?

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

### Is ZERO CARBON TH free?

ZERO CARBON TH is free to download, with no in-app purchases.

### Do FireD or ZERO CARBON TH have ads?

Neither FireD nor ZERO CARBON TH shows ads.

### Which is updated more often, FireD or ZERO CARBON TH?

FireD ships an update every 2 weeks, and ZERO CARBON TH every 3 weeks. Most recently, FireD was updated on October 30, 2026 and ZERO CARBON TH on October 27, 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.*