# NetZero Man vs NAPA

The clearest difference is review sentiment: NAPA at 75% against NetZero Man's 17%. 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.

NetZero Man ships an update every 3 months, NAPA every 2 months. The most recent releases landed on October 12, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | NetZero Man | NAPA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (4 ratings)](https://appshunter.io/ios/app/napa-star-map/id6475964108/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | 16.7% of reviews | **75.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 61 MB | 287 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Thailand Greenhouse Gas Management Organization](https://appshunter.io/developer/938564036) | [National Astronomical Research Institute of Thailand (Public Organization)](https://appshunter.io/developer/1725468782) |

## 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


### NAPA

[App page](https://appshunter.io/ios/app/napa-star-map/id6475964108)

Explore the night sky with this astronomy and planetarium app. Identify stars, constellations, and planets by pointing your device at the sky. Plan future observations by adjusting the time and date.

**Highlights:** Point and observe celestial objects, Star map functionality, Time adjustment for observation planning, Simulate planet positions, Locate specific celestial objects, Real images of deep sky objects

**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 NAPA free?

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

### Do NetZero Man or NAPA have ads?

Neither NetZero Man nor NAPA shows ads.

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

NetZero Man ships an update every 3 months, and NAPA every 2 months. Most recently, NetZero Man was updated on October 12, 2026 and NAPA on October 24, 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.*