Altimeter & Barometer vs HgBarometer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Altimeter & Barometer
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.
- GPS altitude measurement
- Sea level display in meters
- Meter to feet conversion calculator
- Barometric pressure sensor (iPhone 6+)
- Map of current position
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A free simple large font altimeter application that displays map of current position measured by GPS and the sea level in meters (m). With conversion calculator from meter (m) to feet (ft). Barometric function with pressure sensor (iPhone 6 / Plus or later). To prevent flooding and distress. There are errors due to GPS measurement. Relative altitude measurement based on changes in atmospheric pressure.
HgBarometer
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.
- 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
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This app is an invaluable companion for users of mercury barometers. It is also of a highly didactical value for the understanding of barometric pressure related phenomena like different measurement units for this quantity. When using an old-style mercury barometer one must determine the heights at the top and at the glass contact of the meniscus. Moreover, the instrument temperature as well as the gravitational acceleration at the site is needed to estimate the actual barometric pressure. In the past cumbersome tables or laborious calculations were needed to correct the various influence quantities. This app saves you from this trouble. On selected devices you can compare the build-in altimeter with the calculated pressure value of the mercury barometer. Features: - Natural user interface. - Choice between many different pressure units. - Observations and results can be shared in various ways. - May be used to calibrate your mercury barometer (or your iOS device, whichever you deem more accurate)
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Altimeter & Barometer | HgBarometer |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (155 ratings) — better | 4.0 (1 ratings) |
| Positive reviews | 54.5% of reviews | — |
| Number of ratings | 155 — better | 1 |
| Update frequency | Every 13 months | Every 4 months — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15 | 12.0 — better |
| Further details — not scored | ||
| Size | 11 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | SHIGETO TAKAGI | Michael Matus |
Customer experience
Altimeter & Barometer
HgBarometer
In-app purchases
Altimeter & Barometer
No in-app purchases
HgBarometer
No in-app purchases
Questions
Is Altimeter & Barometer free?
Is HgBarometer free?
Which has better reviews, Altimeter & Barometer or HgBarometer?
Do Altimeter & Barometer or HgBarometer have ads?
Which is updated more often, Altimeter & Barometer or HgBarometer?
Other comparisons
