# Altimeter & Barometer vs HgBarometer

The clearest difference is rating: Altimeter & Barometer at 4.6 against HgBarometer's 4.0. Altimeter & Barometer also leads on ratings volume (155 vs 1). HgBarometer's advantage is ads (none vs shown) and update cadence (every 4 months vs every 13 months). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Altimeter & Barometer holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: Altimeter & Barometer has 155 ratings behind it against 1, so its average is the more settled of the two.

Altimeter & Barometer ships an update every 13 months, HgBarometer every 4 months. The most recent releases landed on October 29, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Altimeter & Barometer | HgBarometer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (155 ratings)](https://appshunter.io/ios/app/altimeter-and-barometer/id541514339/reviews)** | [4.0 (1 ratings)](https://appshunter.io/ios/app/hgbarometer/id1234010346/reviews) |
| Number of ratings | **155** | 1 |
| Positive reviews | 54.5% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 13 months | **Every 4 months** |
| Monetization | Ad-supported | **Free** |
| Size | 11 MB | 8 MB |
| Requires iOS | 15 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [SHIGETO TAKAGI](https://appshunter.io/developer/519611619) | [Michael Matus](https://appshunter.io/developer/987936850) |

## What reviewers say

### Altimeter & Barometer

[App page](https://appshunter.io/ios/app/altimeter-and-barometer/id541514339)

This app provides real-time altitude and atmospheric pressure readings. It uses GPS for location and sea level measurements, with a conversion tool for meters to feet. For compatible devices, it also offers barometric pressure sensing.

**Highlights:** GPS altitude measurement, Sea level display in meters, Meter to feet conversion calculator, Barometric pressure sensor (iPhone 6+), Map of current position

**Features:** Vision Pro support

**In-app purchases:** none


### HgBarometer

[App page](https://appshunter.io/ios/app/hgbarometer/id1234010346)

This app assists users of mercury barometers by simplifying pressure calculations. It helps determine barometric pressure by accounting for meniscus height, instrument temperature, and local gravity. It also offers unit conversions and can be used to calibrate barometers.

**Highlights:** Simplifies mercury barometer pressure calculations, Accounts for meniscus height, temperature, and gravity, Supports multiple pressure units, Facilitates barometer calibration, Allows sharing of observations and results

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Altimeter & Barometer free?

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

### Is HgBarometer free?

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

### Which has better reviews, Altimeter & Barometer or HgBarometer?

Altimeter & Barometer is rated higher. Altimeter & Barometer averages 4.6 out of 5 from 155 ratings, while HgBarometer averages 4.0 from 1 ratings.

### Do Altimeter & Barometer or HgBarometer have ads?

Altimeter & Barometer shows ads; HgBarometer does not.

### Which is updated more often, Altimeter & Barometer or HgBarometer?

Altimeter & Barometer ships an update every 13 months, and HgBarometer every 4 months. Most recently, Altimeter & Barometer was updated on October 29, 2026 and HgBarometer on September 17, 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.*