# HgBarometer vs ProKit

The clearest difference is rating: ProKit at 5.0 against HgBarometer's 4.0. ProKit also leads on update cadence (every 2 weeks vs every 4 months). HgBarometer's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 18). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

ProKit holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

HgBarometer ships an update every 4 months, ProKit every 2 weeks. The most recent releases landed on September 17, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | HgBarometer | ProKit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/hgbarometer/id1234010346/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/prokit-barometer-and-tools/id6743349151/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 8 MB | 25 MB |
| Requires iOS | **12.0** | 18 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Michael Matus](https://appshunter.io/developer/987936850) | [omer yuksel](https://appshunter.io/developer/1735991224) |

## 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


### ProKit

[App page](https://appshunter.io/ios/app/prokit-barometer-and-tools/id6743349151)

This utility app offers a suite of tools including a barometer for altitude and pressure, a speedometer, a decibel meter, a heart rate monitor, a compass, NFC tag management, and QR code generation/scanning. It also includes Sudoku puzzles and guided breathing exercises.

**Highlights:** Barometer for altitude and pressure, Speedometer with customization, Decibel meter with live graphs, Heart rate monitor via camera, NFC tag reader/writer, QR code creator and scanner, Sudoku puzzles with statistics, Guided breathing exercises

**In-app purchases:** none


## Frequently asked questions

### Is HgBarometer free?

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

### Is ProKit free?

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

### Which has better reviews, HgBarometer or ProKit?

ProKit is rated higher. HgBarometer averages 4.0 out of 5 from 1 ratings, while ProKit averages 5.0 from 1 ratings.

### Do HgBarometer or ProKit have ads?

Neither HgBarometer nor ProKit shows ads.

### Which is updated more often, HgBarometer or ProKit?

HgBarometer ships an update every 4 months, and ProKit every 2 weeks. Most recently, HgBarometer was updated on September 17, 2026 and ProKit on October 2, 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.*