# HgBarometer vs Sensors Toolbox

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.

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.

## The numbers

| Metric | HgBarometer | Sensors Toolbox |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/hgbarometer/id1234010346/reviews) | **[4.2 (134 ratings)](https://appshunter.io/ios/app/sensors-toolbox-multitool/id1383687190/reviews)** |
| Number of ratings | 1 | **134** |
| Positive reviews | — | 52.8% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 4 months** | Every 7 months |
| Monetization | **Free** | Ad-supported |
| Size | 8 MB | 17 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Michael Matus](https://appshunter.io/developer/987936850) | [Andrew Neal](https://appshunter.io/developer/1102865152) |

## What reviewers say

### 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


### Sensors Toolbox

[App page](https://appshunter.io/ios/app/sensors-toolbox-multitool/id1383687190)

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.

**Highlights:** Real-time sensor data collection, Accelerometer, gyroscope, GPS, Barometer, decibel meter, metal detector, Compass functionality, Intuitive graph visualization, User-friendly interface

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is HgBarometer free?

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

### Is Sensors Toolbox free?

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

### Which has better reviews, HgBarometer or Sensors Toolbox?

Sensors Toolbox is rated higher. HgBarometer averages 4.0 out of 5 from 1 ratings, while Sensors Toolbox averages 4.2 from 134 ratings.

### Do HgBarometer or Sensors Toolbox have ads?

Sensors Toolbox shows ads; HgBarometer does not.

### Which is updated more often, HgBarometer or Sensors Toolbox?

HgBarometer ships an update every 4 months, and Sensors Toolbox every 7 months. Most recently, HgBarometer was updated on September 17, 2026 and Sensors Toolbox on October 7, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*