# NetZero Man vs ERG4Thai

NetZero Man and ERG4Thai 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 months. The most recent releases landed on July 4, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | NetZero Man | ERG4Thai |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 16.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Free | — |
| Size | 61 MB | 86 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [THAILAND GREENHOUSE GAS MANAGEMENT ORGANIZATION](https://appshunter.io/developer/938564036) | [Pollution Control Department, Thailand](https://appshunter.io/developer/966167337) |

## What reviewers say

### NetZero Man

[App page](https://appshunter.io/ios/app/netzero-man/id938564037)

Calculate the carbon footprint of products, services, and organizations. Raise awareness of greenhouse gas emissions from daily activities to encourage sustainable shopping habits and combat climate change.

**Highlights:** Carbon footprint calculation, Product footprint analysis, Service footprint analysis, Organization footprint analysis, Greenhouse gas emission awareness, Sustainable shopping guidance

**Features:** macOS Compatibility

**In-app purchases:** none


### ERG4Thai

[App page](https://appshunter.io/ios/app/erg4thai/id1514892942)

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

**In-app purchases:** none


## Frequently asked questions

### Is NetZero Man free?

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

### Is ERG4Thai free?

ERG4Thai is free to download, with no in-app purchases.

### Do NetZero Man or ERG4Thai have ads?

Neither NetZero Man nor ERG4Thai shows ads.

### Which is updated more often, NetZero Man or ERG4Thai?

NetZero Man ships an update every 3 months, and ERG4Thai every 3 months. Most recently, NetZero Man was updated on July 4, 2026 and ERG4Thai on September 22, 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.*