# ZERO CARBON TH vs Washville

The clearest difference is iOS requirement: ZERO CARBON TH at 13.0 against Washville's 15.0. 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.

ZERO CARBON TH ships an update every 3 weeks, Washville every 2 weeks. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | ZERO CARBON TH | Washville |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Size | 41 MB | 45 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Thailand Greenhouse Gas Management Organization](https://appshunter.io/developer/938564036) | [Qingdao EQLink Technology Co., Ltd.](https://appshunter.io/developer/1500827798) |

## What reviewers say

### ZERO CARBON TH

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

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

**In-app purchases:** none


### Washville

[App page](https://appshunter.io/ios/app/washville/id6797826768)

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

**In-app purchases:** none


## Frequently asked questions

### Is ZERO CARBON TH free?

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

### Is Washville free?

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

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

Neither ZERO CARBON TH nor Washville shows ads.

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

ZERO CARBON TH ships an update every 3 weeks, and Washville every 2 weeks. Most recently, ZERO CARBON TH was updated on October 30, 2026 and Washville on October 31, 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.*