# Boating Calcs vs VMH Flex Marine

The clearest difference is price: VMH Flex Marine at Free against Boating Calcs's $1.99. VMH Flex Marine also leads on update cadence (every 3 months vs every 7 months). Boating Calcs's advantage is rating (4.8 vs 1.0) and ratings volume (28 vs 1). On ads, in-app purchases, monetization model and device support there is nothing between them.

VMH Flex Marine is free to download; Boating Calcs costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Boating Calcs holds the better App Store score, 4.8 against 1.0. That said, the two scores are not equally well evidenced: Boating Calcs has 28 ratings behind it against 1, so its average is the more settled of the two.

Boating Calcs ships an update every 7 months, VMH Flex Marine every 3 months. The most recent releases landed on November 5, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Boating Calcs | VMH Flex Marine |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.8 (28 ratings)](https://appshunter.io/ios/app/boating-calcs/id410592998/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/vmh-flex-marine/id6747126000/reviews) |
| Number of ratings | **28** | 1 |
| Positive reviews | 81.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 months** |
| Monetization | Free | Free |
| Size | 17 MB | 3 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Calculated Industries](https://appshunter.io/developer/370406449) | [Veratron AG](https://appshunter.io/developer/1765346453) |

## What reviewers say

### Boating Calcs

[App page](https://appshunter.io/ios/app/boating-calcs/id410592998)

This app offers over 120 boating calculations and unit conversions, along with 120 reference pages. Easily solve a variety of boating-related problems, save and share your calculations, and quickly find the tools you need. It includes extensive reference material across various boating disciplines.

**Highlights:** Over 120 boating calculations, Extensive unit conversions, 120+ reference pages, Save and open calculations, Add calculators to favorites, Email calculation inputs and results, Search functionality

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

**In-app purchases:** none


### VMH Flex Marine

[App page](https://appshunter.io/ios/app/vmh-flex-marine/id6747126000)

This compact device displays extensive boat data, customizable across multiple screens. Easily set up alarms and access information via a smartphone app, even with gloves or in wet conditions.

**Highlights:** Compact and powerful display, Customizable data screens, Laser touch button for navigation, Smartphone setup and control, Reads from sensors and CAN, LIN connectivity for battery data

**In-app purchases:** none


## Frequently asked questions

### Is Boating Calcs free?

Boating Calcs costs $1.99, with no in-app purchases.

### Is VMH Flex Marine free?

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

### Which has better reviews, Boating Calcs or VMH Flex Marine?

Boating Calcs is rated higher. Boating Calcs averages 4.8 out of 5 from 28 ratings, while VMH Flex Marine averages 1.0 from 1 ratings.

### Do Boating Calcs or VMH Flex Marine have ads?

Neither Boating Calcs nor VMH Flex Marine shows ads.

### Which is updated more often, Boating Calcs or VMH Flex Marine?

Boating Calcs ships an update every 7 months, and VMH Flex Marine every 3 months. Most recently, Boating Calcs was updated on November 5, 2026 and VMH Flex Marine on October 30, 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.*