HgBarometer vs Sensors Toolbox
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)
Sensors Toolbox
Access and visualize data from all your smartphone's sensors in real time. Collect information from accelerometers, gyroscopes, GPS, barometers, and more, then convert it into easy-to-read graphs. This app offers a clean, intuitive interface for comprehensive sensor analysis.
- Real-time sensor data collection
- Accelerometer, gyroscope, GPS
- Barometer, decibel meter, metal detector
- Compass functionality
- Intuitive graph visualization
- User-friendly interface
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Sensor toolbox makes the most of all the sensors in your smartphone. With a user-friendly interface and easy to read layout, Sensor Multitool - Toolbox allows you to collect data in real time for any and all sensors on your phone. Convert the data into easy to read graphs with a detailed readout from each sensor. This app contains everything you need: an accelerometer, gyroscope, GPS Data, barometer, decibel meter, metal detector, compass, and much more. This app follows all material design guidelines, meaning the app is clean and simple to use This app uses intuitive graphs to create clean, orderly graphs of all data collected.
Screenshots
Verdict
The clearest difference is ads: HgBarometer at none against Sensors Toolbox's shown. HgBarometer also leads on monetization model (free vs ad-supported) and iOS requirement (12.0 vs 15.0). Sensors Toolbox's advantage is ratings volume (134 vs 1) and rating (4.2 vs 4.0). On price, update cadence, 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.
Sensors Toolbox holds the better App Store score, 4.2 against 4.0. That said, the two scores are not equally well evidenced: Sensors Toolbox has 134 ratings behind it against 1, so its average is the more settled of the two.
HgBarometer ships an update every 4 months, Sensors Toolbox every 7 months. The most recent releases landed on September 17, 2026 and October 7, 2026 respectively.
| Parameter | HgBarometer | Sensors Toolbox |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (1 ratings) | 4.2 (134 ratings) — better |
| Positive reviews | — | 52.8% of reviews |
| Number of ratings | 1 | 134 — better |
| Update frequency | Every 4 months — better | Every 7 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 8 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | Michael Matus | Andrew Neal |
Customer experience
HgBarometer
Sensors Toolbox
In-app purchases
HgBarometer
No in-app purchases
Sensors Toolbox
No in-app purchases
Questions
Is HgBarometer free?
Is Sensors Toolbox free?
Which has better reviews, HgBarometer or Sensors Toolbox?
Do HgBarometer or Sensors Toolbox have ads?
Which is updated more often, HgBarometer or Sensors Toolbox?
Other comparisons
