# Altimeter vs Alt

The clearest difference is in-app purchases: Alt at none against Altimeter's 5. Alt also leads on iOS requirement (17.0 vs 26.0). Altimeter's advantage is update cadence (every 3 months vs every 15 months) and review sentiment (96% vs 76%). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Altimeter sells 5 in-app purchases, starting at $1.99 per year. Alt asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.6 for Altimeter against 4.5 for Alt. Both are backed by a comparable volume of ratings — 21 and 8 respectively. Written reviews are what separate them: 96% of Altimeter's written reviews are positive against 76% of Alt's.

Altimeter ships an update every 3 months, Alt every 15 months. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Altimeter | Alt |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (21 ratings)](https://appshunter.io/ios/app/altimeter-elevation-and-gps/id1067580904/reviews)** | [4.5 (8 ratings)](https://appshunter.io/ios/app/alt-o-meter/id1073846820/reviews) |
| Number of ratings | **21** | 8 |
| Positive reviews | **96.2% of reviews** | 76.5% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 15 months |
| Monetization | Free | Free |
| Size | 17 MB | 3 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [22of8 GmbH](https://appshunter.io/developer/502617768) | [Joshua Hinman](https://appshunter.io/developer/1073846819) |

## What reviewers say

### Altimeter

[App page](https://appshunter.io/ios/app/altimeter-elevation-and-gps/id1067580904)

Determine your current altitude and save important locations to navigate back to them later. This app supports multiple coordinate systems and can be used on iPhone, iPad, and Apple Watch. It prioritizes battery saving by only using GPS when the app is active.

**Highlights:** Current altitude measurement, Save and navigate to locations, Multiple coordinate systems, Share location and altitude, Apple Watch support, Battery-saving GPS usage

**Features:** Apple Watch app

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Supporter | $1.99 | per year |
| Generous tip | $1.99 | one-time |
| Massive tip | $3.99 | one-time |
| Amazing tip | $8.99 | one-time |
| Buy me a Mac | $599.99 | one-time |


### Alt

[App page](https://appshunter.io/ios/app/alt-o-meter/id1073846820)

This app calculates your precise altitude above sea level using your device's barometer or GPS. It offers a realistic, retro design and automatically calibrates for local atmospheric pressure, with optional manual calibration for advanced users.

**Highlights:** Barometer-based altitude calculation, GPS fallback for devices without barometer, Automatic local pressure calibration, Optional user calibration, Retro-style interface, Precise height above sea level

**In-app purchases:** none


## Frequently asked questions

### Is Altimeter free?

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

### Is Alt free?

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

### Which has better reviews, Altimeter or Alt?

Altimeter is rated higher. Altimeter averages 4.6 out of 5 from 21 ratings, while Alt averages 4.5 from 8 ratings.

### Do Altimeter or Alt have ads?

Neither Altimeter nor Alt shows ads.

### Which is updated more often, Altimeter or Alt?

Altimeter ships an update every 3 months, and Alt every 15 months. Most recently, Altimeter was updated on October 26, 2026 and Alt 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.*