# Altimeter X vs A

The clearest difference is review sentiment: Altimeter X at 84% against A's 0%. Altimeter X also leads on price ($0.99 vs $54.99) and iOS requirement (10.0 vs 14.0). A's advantage is rating (3.7 vs 2.5) and update cadence (every 2 months vs every 28 months). On ratings volume, ads, in-app purchases and device support there is nothing between them.

Altimeter X costs $0.99 and A $54.99 up front. Neither carries in-app purchases, so what you see is what you pay.

A holds the better App Store score, 3.7 against 2.5. Both are backed by a comparable volume of ratings — 2 and 3 respectively. Written reviews complicate that: 84% of Altimeter X's written reviews are positive against 0% of A's, so the app with the better star average is not the one people write more warmly about.

Altimeter X ships an update every 28 months, A every 2 months. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Altimeter X | A |
| --- | --- | --- |
| Price | **$0.99** | $54.99 |
| Rating | [2.5 (2 ratings)](https://appshunter.io/ios/app/altimeter-x/id414640034/reviews) | **[3.7 (3 ratings)](https://appshunter.io/ios/app/a-efis-pro/id977144283/reviews)** |
| Number of ratings | 2 | **3** |
| Positive reviews | **83.6% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 28 months | **Every 2 months** |
| Monetization | **Free** | Paid |
| Best chart rank | — | **#176** |
| Size | 1 MB | 12 MB |
| Requires iOS | **10.0** | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [LiveWorlds](https://appshunter.io/developer/414640037) | [Charalampos Baltzakis](https://appshunter.io/developer/1313220759) |

## What reviewers say

### Altimeter X

[App page](https://appshunter.io/ios/app/altimeter-x/id414640034)

This app provides altitude readings using GPS, your device's barometer, or an elevation database. It offers different methods for accuracy and tracking changes, with options for calibration and offline use.

**Highlights:** GPS altitude estimation, Barometric altitude tracking, Elevation database lookup, Weather data calibration, GPS altitude calibration, Offline elevation data

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

**In-app purchases:** none


### A

[App page](https://appshunter.io/ios/app/a-efis-pro/id977144283)

**Currently charting:** #176 Top Paid · Navigation (US App Store)

This electronic flight information system runs on your iPhone or iPad, providing pilots with essential flight data like artificial horizon, GPS-based speed, altitude, and more. It's designed for use in airplanes only and is not a certified aviation instrument.

**Highlights:** Artificial Horizon (AHRS), GPS Ground Speed, GPS Altimeter, GPS Vertical Speed, Turn Coordinator, Slip Ball, Compass

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

**In-app purchases:** none


## Frequently asked questions

### Is Altimeter X free?

Altimeter X costs $0.99, with no in-app purchases.

### Is A free?

A costs $54.99, with no in-app purchases.

### Which has better reviews, Altimeter X or A?

A is rated higher. Altimeter X averages 2.5 out of 5 from 2 ratings, while A averages 3.7 from 3 ratings.

### Do Altimeter X or A have ads?

Neither Altimeter X nor A shows ads.

### Which is updated more often, Altimeter X or A?

Altimeter X ships an update every 28 months, and A every 2 months. Most recently, Altimeter X was updated on October 26, 2026 and A 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.*