# Marine Barometer — Designed for mariners

> Mariner's barometer app for accurate atmospheric pressure readings and weather evaluation. (iPhone/iPad app by Starpath Corp.)

- Source: https://appshunter.io/ios/app/marine-barometer/id1370744934 (this page in markdown: same URL + `.md`)
- Developer: [Starpath Corp](https://appshunter.io/developer/1345556660)
- Category: Weather, Navigation
- Price: Free
- Rating: 4.50/5 from 33 App Store ratings · 9 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 38 MB
- Languages: American English
- Released: 2018-07-11
- Data updated: 2026-08-23
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/marine-barometer/id1370744934/reviews.md

## What is Marine Barometer?

Marine Barometer is a barometer sensor interface that is uniquely designed to meet the needs of mariners who rely on accurate atmospheric pressure for weather routing and the evaluation of weather maps. Pressure readings can be manually saved permanently along with the latitude, longitude, and time of the reading. If a sensor offset has been applied, that value is also stored with each recorded pressure. These recorded pressures can then at the navigator's convenience be transferred to the vessel's printed logbook. 

The GPS sensor is accessed for latitude and longitude only. The elevation of the sensor (your iOS device that includes a barometer) above sea level must be entered manually. Elevation values from the GPS are not accurate enough for the intended application.

The concept of sea level pressure is explained along with how it is determined from the sensor reading.

Instructions are provided on how to check the calibration of the sensor, and a sensor offset can be applied as needed. Links to sources of accurate sea level pressure are included.  Sources of accurate elevation are included for use on land.

The standard units for marine applications are millibars (mb) or hectoPascals (hPa). The main pressure display can also be set to inches of mercury, millimeters of mercury, or kiloPascals. However, because the primary reference pressures that would be used to check the sensor calibration are in mb, the sensor calibration must be set using millibar units. 

Reference links are provided for learning more about the tactical use of pressure for weather forecasting and weather map evaluation. Discounts are offered for barometer related reference books.

## Key features

- Accurate atmospheric pressure readings
- Manual saving of pressure, location, and time
- Sensor offset adjustment
- Sea level pressure explanation
- Calibration check instructions
- Multiple pressure unit options

## Recent user reviews (9 of 9)

All indexed reviews: https://appshunter.io/ios/app/marine-barometer/id1370744934/reviews.md

### 1/5 — Useless

*2021-06-28*

This app is completely useless unless you also buy the related Marine Barograph app for $15.  I didn’t bite.

**Developer response:** May I please note that the listed functions of the free Marine Barometer are not in any way tied to the functions of the Marine Barograph app. The latter is a totally separate app with enhanced storage and display options, but none of these are needed to benefit from the described functions of the Marine Barometer.

### 5/5 — Great app!

*2020-12-29*

I just discovered the “graph” view. How long has that been there. So very helpful, thanks.

### 5/5 — Marine Barometer

*2019-02-25*

Just started looking at this app. Just on the basis of the detailed info it contains, the references it lists and the potential it affords with incredible ease, the publisher should be greatly admired and complemented. App is very well designed and explained and brings this data and science within easy reach of even the more casual user. Many kudos!

### 5/5 — Good tool

*2018-10-18*

Great app, easy to use especially as we are always at sea level. I like that it generates lat and long at the same time.
Could really gain from having some sort of graphing tool to easily see the trends.

### 3/5 — Useful but could be better

*2018-09-21*

I would like to be able to generate a graph from the saved data.

### 5/5 — Excellent

*2018-08-01*

Excellent useful app.
Thank you!

### 5/5 — Best in the App Store

*2018-06-20*

I have never taken the time to review an app before, but I am so pleased with this one that I had to stop and write one.

My wife and I are offshore sailors, and I’ve been looking for a really accurate barometer for about a year. I really accurate barometers are really expensive, so I hoped to make do with an iPhone app. 

I think I have most of them, at this point, but this is the first one that ticks all the most important boxes. 

First, it’s not a black box with hard to understand calibration parameters. It has exactly two, and they are the two obvious and critical ones: altitude and sensor offset. These are the only two required for accurate readings, so I’m not sure why other apps have more. This is a case where more is not better.

Second, it averages the readings. The sensor in the iPhone is pretty jittery so averaging is absolutely necessary. 

The result is a simple, accurate barometer that — I hope — will stay accurate over a goodly period of time. I haven’t used it long enough to know if it drifts over time, but I guess that would be the fault of the sensor, not the app. 

I intend to track its accuracy over time, with the hope I don’t have to buy one of those $700 barometers! 

Well done.

### 5/5 — Damn good app

*2018-06-10*

I read the info on the Starpath site, d/l the iOS app, calibrated for elevation, and took a reading. Then I went to a weather site to cross check the pressure with the government data. They matched within 1 mm of pressure. ‘Nough said!

### 5/5 — Useful utility

*2018-06-09*

Straight forward and nicely organized for the sailor.  I can now compare my ships barometer to the barometer in my iPhone

## Frequently asked questions about Marine Barometer

### What is the rating for Marine Barometer?

Marine Barometer has a strong rating of 4.5 stars based on 32 user reviews, indicating high user satisfaction.

### Does Marine Barometer have ads?

No, Marine Barometer is ad-free, providing an uninterrupted experience for users.

### How often is Marine Barometer updated?

The app was last updated on March 14, 2024, with version 1.4, suggesting regular maintenance and potential feature additions.

### What devices support Marine Barometer?

Marine Barometer is compatible with iPhone, iPad, and iPod devices, making it accessible to a wide range of Apple users.

### What is the age rating for Marine Barometer?

Marine Barometer is suitable for users aged 4 and up, making it appropriate for a broad audience.

### Can I manually save pressure readings in Marine Barometer?

Yes, you can manually save pressure readings along with the latitude, longitude, and time of the reading for later reference.

### Does Marine Barometer explain how to determine sea level pressure?

Yes, the app provides an explanation of the concept of sea level pressure and how it is determined from the sensor reading.

### Can I adjust the sensor calibration in Marine Barometer?

Yes, instructions are provided on how to check the calibration of the sensor, and a sensor offset can be applied as needed.

## Version history (last 5 releases)

### 1.4 — 2024-03-14

Fixes for iOS 17.4.

### 1.3 — 2020-12-23

Updated resources and options.

### 1.2 — 2019-10-10

Updated for iOS 13.

### 1.1 — 2018-06-12

Improved iPad display.

### 1.0 — 2018-06-07

No release notes.

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## More apps by Starpath Corp

- [StarPilot](https://appshunter.io/ios/app/starpilot/id359071446)
- [Marine Barograph](https://appshunter.io/ios/app/marine-barograph/id1393761744)
- [WindCalc](https://appshunter.io/ios/app/windcalc/id6455129265)

All apps by Starpath Corp: https://appshunter.io/developer/1345556660

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-23.*