# Sound24Thai vs ZERO CARBON TH

Sound24Thai and ZERO CARBON TH are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Both ship on a similar rhythm, roughly every 3 weeks. Both last shipped on October 9, 2026.

## The numbers

| Metric | Sound24Thai | ZERO CARBON TH |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Size | 58 MB | 41 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Pollution Control Department, Thailand](https://appshunter.io/developer/966167337) | [Thailand Greenhouse Gas Management Organization](https://appshunter.io/developer/938564036) |

## What reviewers say

### Sound24Thai

[App page](https://appshunter.io/ios/app/sound24thai/id1667536383)

**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 Sound24Thai free?

Sound24Thai 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 Sound24Thai or ZERO CARBON TH have ads?

Neither Sound24Thai nor ZERO CARBON TH shows ads.

### Which is updated more often, Sound24Thai or ZERO CARBON TH?

Sound24Thai ships an update every 3 weeks, and ZERO CARBON TH every 3 weeks. Most recently, Sound24Thai was updated on October 9, 2026 and ZERO CARBON TH on October 9, 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.*