# NetZero Man vs Potential Energy Calculator

The clearest difference is price: NetZero Man at Free against Potential Energy Calculator's $2.99. NetZero Man also leads on update cadence (every 3 months vs every 28 months) and iOS requirement (12.0 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

NetZero Man is free to download; Potential Energy Calculator costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

NetZero Man ships an update every 3 months, Potential Energy Calculator every 28 months. The most recent releases landed on October 12, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | NetZero Man | Potential Energy Calculator |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Positive reviews | 16.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 28 months |
| Monetization | Free | — |
| Size | 61 MB | 1 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Thailand Greenhouse Gas Management Organization](https://appshunter.io/developer/938564036) | [Nitrio](https://appshunter.io/developer/321121189) |

## 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


### Potential Energy Calculator

[App page](https://appshunter.io/ios/app/potential-energy-calculator/id1399441583)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is NetZero Man free?

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

### Is Potential Energy Calculator free?

Potential Energy Calculator costs $2.99, with no in-app purchases.

### Do NetZero Man or Potential Energy Calculator have ads?

Neither NetZero Man nor Potential Energy Calculator shows ads.

### Which is updated more often, NetZero Man or Potential Energy Calculator?

NetZero Man ships an update every 3 months, and Potential Energy Calculator every 28 months. Most recently, NetZero Man was updated on October 12, 2026 and Potential Energy Calculator on October 26, 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.*