# Altimeter GPS Barometer vs Zero Meter

The clearest difference is in-app purchases: Zero Meter at none against Altimeter GPS Barometer's 3. Zero Meter also leads on ads (none vs shown) and device support (3 vs 1). On price and iOS requirement there is nothing between them.

Both are free to download. Altimeter GPS Barometer sells 3 one-off in-app purchases. Zero Meter asks for nothing beyond the download.

## The numbers

| Metric | Altimeter GPS Barometer | Zero Meter |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 days | — |
| Size | 41 MB | 2 MB |
| Requires iOS | 16.0 | 16 |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [静华 黄](https://appshunter.io/developer/1501801862) | [辉 吴](https://appshunter.io/developer/1893273006) |

## What reviewers say

### Altimeter GPS Barometer

[App page](https://appshunter.io/ios/app/altimeter-gps-barometer/id6475106813)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |
| Forever Unlock Compass(Magic) | $0.99 | one-time |
| Forever Unlock Compass(Simple) | $1.99 | one-time |


### Zero Meter

[App page](https://appshunter.io/ios/app/zero-meter/id6772456073)

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

**In-app purchases:** none


## Frequently asked questions

### Is Altimeter GPS Barometer free?

Altimeter GPS Barometer is free to download, with in-app purchases available.

### Is Zero Meter free?

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

### Do Altimeter GPS Barometer or Zero Meter have ads?

Altimeter GPS Barometer shows ads; Zero Meter does not.

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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.*