# Pro Altimeter vs Topo Fire

The clearest difference is price: Topo Fire at Free against Pro Altimeter's $0.99. Topo Fire also leads on rating (4.5 vs 3.8) and update cadence (weekly vs every 12 months). Pro Altimeter's advantage is in-app purchases (none vs 1) and chart position (#73 vs unranked). On ads there is nothing between them.

Topo Fire is free to download; Pro Altimeter costs $0.99 up front. Topo Fire sells 1 in-app purchase, starting at $59.99 per year. Pro Altimeter asks for nothing beyond the download.

Topo Fire holds the better App Store score, 4.5 against 3.8. Both are backed by a comparable volume of ratings — 40 and 11 respectively.

Pro Altimeter ships an update every 12 months, Topo Fire weekly. The most recent releases landed on November 1, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Pro Altimeter | Topo Fire |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [3.8 (40 ratings)](https://appshunter.io/ios/app/pro-altimeter-barometric-plus-gps/id926603602/reviews) | **[4.5 (11 ratings)](https://appshunter.io/ios/app/topo-fire/id6446780541/reviews)** |
| Number of ratings | **40** | 11 |
| Positive reviews | 55.6% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 12 months | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Best chart rank | **#73** | — |
| Size | 1 MB | 185 MB |
| Requires iOS | **12.0** | 15 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Craig Hunter](https://appshunter.io/developer/286743884) | [Glacier Peak Studios LLC](https://appshunter.io/developer/672246356) |

## What reviewers say

### Pro Altimeter

[App page](https://appshunter.io/ios/app/pro-altimeter-barometric-plus-gps/id926603602)

**Currently charting:** #73 Top Paid · Navigation (US App Store)

This app measures and computes altitude using your device's barometric pressure sensor and GPS. It offers multiple calibration methods, including GPS, manual input, and airport METAR data, for accurate readings. The interface is simple with large, easy-to-read numbers and offers distinct day and night display modes.

**Highlights:** Barometric and GPS altitude measurement, Multiple calibration methods (GPS, manual, METAR), Real-time accuracy estimates, Large, easy-to-read display, Day and night display modes, Calibration reminders

**Features:** Vision Pro support

**In-app purchases:** none


### Topo Fire

[App page](https://appshunter.io/ios/app/topo-fire/id6446780541)

This app provides wildland firefighters with essential mapping tools and resources for incident response. It offers shared incident maps, various map layers, and navigation aids, all accessible on mobile devices and Apple Watch.

**Highlights:** Shared incident maps with live location, Multiple map layers (USGS, Forest Service, etc.), Drawing and waypoint tools, Proximity alerts, Apple Watch integration, Cloud sync across devices

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Topo Fire Pro | $59.99 | per year |


## Frequently asked questions

### Is Pro Altimeter free?

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

### Is Topo Fire free?

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

### Which has better reviews, Pro Altimeter or Topo Fire?

Topo Fire is rated higher. Pro Altimeter averages 3.8 out of 5 from 40 ratings, while Topo Fire averages 4.5 from 11 ratings.

### Do Pro Altimeter or Topo Fire have ads?

Neither Pro Altimeter nor Topo Fire shows ads.

### Which is updated more often, Pro Altimeter or Topo Fire?

Pro Altimeter ships an update every 12 months, and Topo Fire weekly. Most recently, Pro Altimeter was updated on November 1, 2026 and Topo Fire 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.*