HgBarometer vs NB
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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)
NB
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Official app for setting up the Steamrock NB-42 Digital Barometer using NFC.
Screenshots
Verdict
HgBarometer and NB are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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.
HgBarometer ships an update every 4 months, NB every 8 months. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.
| Parameter | HgBarometer | NB |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 4 months — better | Every 8 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 8 MB | 18 MB |
| Age rating | 4+ | 17+ |
| Developer | Michael Matus | Steamrock Inc. |
In-app purchases
HgBarometer
No in-app purchases
NB
No in-app purchases
Questions
Is HgBarometer free?
Is NB free?
Do HgBarometer or NB have ads?
Which is updated more often, HgBarometer or NB?
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