# Altimeter vs UniTrip

The clearest difference is in-app purchases: Altimeter at none against UniTrip's 1. Altimeter also leads on device support (3 vs 1) and iOS requirement (15.0 vs 18.0). UniTrip's advantage is ads (none vs shown) and update cadence (every 2 days vs every 2 months). On price there is nothing between them.

Both are free to download. UniTrip sells 1 one-off in-app purchase. Altimeter asks for nothing beyond the download.

Altimeter ships an update every 2 months, UniTrip every 2 days. The most recent releases landed on November 13, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Altimeter | UniTrip |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (127 ratings)](https://appshunter.io/ios/app/altimeter-i/id905216286/reviews)** | — |
| Number of ratings | **127** | — |
| Positive reviews | 53.5% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 2 days** |
| Monetization | Ad-supported | — |
| Size | 7 MB | 30 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [EONSOFT](https://appshunter.io/developer/899851112) | [Miyoko Katsuno](https://appshunter.io/developer/6794799681) |

## 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, iPhone Duo support

**In-app purchases:** none


### UniTrip

[App page](https://appshunter.io/ios/app/unitrip/id6815112996)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Trips | $14.99 | one-time |


## Frequently asked questions

### Is Altimeter free?

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

### Is UniTrip free?

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

### Do Altimeter or UniTrip have ads?

Altimeter shows ads; UniTrip does not.

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

Altimeter ships an update every 2 months, and UniTrip every 2 days. Most recently, Altimeter was updated on November 13, 2026 and UniTrip on November 6, 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.*