# Marine Barometer vs BayCurrents

The clearest difference is rating: BayCurrents at 5.0 against Marine Barometer's 4.5. BayCurrents also leads on update cadence (every 2 months vs every 15 months). Marine Barometer's advantage is ratings volume (33 vs 3) and iOS requirement (12.0 vs 15.0). On price, ads, in-app purchases and monetization model there is nothing between them.

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

BayCurrents holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Marine Barometer has 33 ratings behind it against 3, so its average is the more settled of the two.

Marine Barometer ships an update every 15 months, BayCurrents every 2 months. The most recent releases landed on October 3, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Marine Barometer | BayCurrents |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (33 ratings)](https://appshunter.io/ios/app/marine-barometer/id1370744934/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/baycurrents/id1591997070/reviews)** |
| Number of ratings | **33** | 3 |
| Positive reviews | 77.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 38 MB | 1 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Starpath Corp](https://appshunter.io/developer/1345556660) | [Monterey Bay Aquarium Research Institute](https://appshunter.io/developer/997448509) |

## What reviewers say

### Marine Barometer

[App page](https://appshunter.io/ios/app/marine-barometer/id1370744934)

This app provides accurate atmospheric pressure readings for mariners, allowing them to manually save readings with location and time data. It explains sea level pressure calculation and offers calibration checks with adjustable sensor offsets.

**Highlights:** 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

**Features:** Vision Pro support

**In-app purchases:** none


### BayCurrents

[App page](https://appshunter.io/ios/app/baycurrents/id1591997070)

Visualize high-resolution surface currents in the San Francisco Bay. This app supports various maritime activities with data up to 48 hours in the future. It operates autonomously offline, using NOAA model data enhanced by radar and tidal observations.

**Highlights:** High-resolution surface current maps, 48-hour future forecasting, Offline autonomous operation, NOAA numerical model data, Supports recreational and professional maritime activities

**In-app purchases:** none


## Frequently asked questions

### Is Marine Barometer free?

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

### Is BayCurrents free?

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

### Which has better reviews, Marine Barometer or BayCurrents?

BayCurrents is rated higher. Marine Barometer averages 4.5 out of 5 from 33 ratings, while BayCurrents averages 5.0 from 3 ratings.

### Do Marine Barometer or BayCurrents have ads?

Neither Marine Barometer nor BayCurrents shows ads.

### Which is updated more often, Marine Barometer or BayCurrents?

Marine Barometer ships an update every 15 months, and BayCurrents every 2 months. Most recently, Marine Barometer was updated on October 3, 2026 and BayCurrents on October 4, 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.*