# Altimeter vs Compass GPS Altimeter

The clearest difference is rating: Altimeter at 4.7 against Compass GPS Altimeter's 4.2. Altimeter also leads on in-app purchases (none vs 5) and ratings volume (124 vs 6). Compass GPS Altimeter's advantage is ads (none vs shown) and update cadence (every 8 days vs every 2 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Compass GPS Altimeter sells 5 in-app purchases, starting at $12.99 per 7 days. Altimeter asks for nothing beyond the download.

Altimeter holds the better App Store score, 4.7 against 4.2. That said, the two scores are not equally well evidenced: Altimeter has 124 ratings behind it against 6, so its average is the more settled of the two. Written reviews complicate that: 53% of Altimeter's written reviews are positive against 79% of Compass GPS Altimeter's, so the app with the better star average is not the one people write more warmly about.

Altimeter ships an update every 2 months, Compass GPS Altimeter every 8 days. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Altimeter | Compass GPS Altimeter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (124 ratings)](https://appshunter.io/ios/app/altimeter-i/id905216286/reviews)** | [4.2 (6 ratings)](https://appshunter.io/ios/app/compass-gps-altimeter/id6745474561/reviews) |
| Number of ratings | **124** | 6 |
| Positive reviews | 53.5% of reviews | **78.6% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 8 days** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 7 MB | 33 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | +4 |
| Developer | [EONSOFT](https://appshunter.io/developer/899851112) | [成都关键元素科技有限公司](https://appshunter.io/developer/6779301920) |

## What reviewers say

### Altimeter

[App page](https://appshunter.io/ios/app/altimeter-i/id905216286)

This app uses your iPhone's GPS to display your current, maximum, and minimum altitude. It's ideal for hikers and travelers who need to know their elevation in various units and with adjustable scale magnification.

**Highlights:** GPS altitude display, Current, max, and min altitude tracking, Multiple unit options (m, ft, yd), Adjustable scale magnification, Ideal for hiking and travel

**Features:** Vision Pro support

**In-app purchases:** none


### Compass GPS Altimeter

[App page](https://appshunter.io/ios/app/compass-gps-altimeter/id6745474561)

This app provides advanced outdoor navigation tools, including a precision compass, altimeter, barometer, and offline GPS tracking. It offers features like geo-data watermarking on photos, weather station data, and hazard alerts to enhance safety and documentation for adventurers.

**Highlights:** Precision compass with real-time data, High-accuracy altimeter and barometer, Offline GPS tracking and navigation, Geo-data watermarking on photos, Comprehensive weather station data, Hazard alerts and SOS functionality

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CompassPro | $12.99 | per 7 days |
| CompassPro | $19.99 | per month |
| CompassPro | $24.99 | per 3 months |
| CompassPro | $29.99 | per year |
| CompassPro | $49.99 | one-time |


## Frequently asked questions

### Is Altimeter free?

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

### Is Compass GPS Altimeter free?

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

### Which has better reviews, Altimeter or Compass GPS Altimeter?

Altimeter is rated higher. Altimeter averages 4.7 out of 5 from 124 ratings, while Compass GPS Altimeter averages 4.2 from 6 ratings.

### Do Altimeter or Compass GPS Altimeter have ads?

Altimeter shows ads; Compass GPS Altimeter does not.

### Which is updated more often, Altimeter or Compass GPS Altimeter?

Altimeter ships an update every 2 months, and Compass GPS Altimeter every 8 days. Most recently, Altimeter was updated on November 1, 2026 and Compass GPS Altimeter on October 30, 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.*