# Propeller Calc vs VL Flex Configurator

The clearest difference is review sentiment: Propeller Calc at 100% against VL Flex Configurator's 0%. VL Flex Configurator's advantage is rating (5.0 vs 3.0) and update cadence (every 2 months vs every 21 months). 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.

VL Flex Configurator holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews complicate that: 100% of Propeller Calc's written reviews are positive against 0% of VL Flex Configurator's, so the app with the better star average is not the one people write more warmly about.

Propeller Calc ships an update every 21 months, VL Flex Configurator every 2 months. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Propeller Calc | VL Flex Configurator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (1 ratings)](https://appshunter.io/ios/app/propeller-calc/id478119478/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/vl-flex-configurator/id1542323899/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 3 MB | 3 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Frode Rørvik](https://appshunter.io/developer/478119481) | [Veratron AG](https://appshunter.io/developer/1765346453) |

## What reviewers say

### Propeller Calc

[App page](https://appshunter.io/ios/app/propeller-calc/id478119478)

This utility calculates propeller performance metrics like pitch, gear ratio, RPM, slip, and speed. Input any four values, and the app computes the fifth, helping users understand the relationship between propeller design and boat performance.

**Highlights:** Calculate pitch, gear ratio, RPM, slip, and speed, Enter any four variables to find the fifth, Understand propeller slip and its impact, Supports iPhone and iPad, Free to use

**Features:** macOS Compatibility

**In-app purchases:** none


### VL Flex Configurator

[App page](https://appshunter.io/ios/app/vl-flex-configurator/id1542323899)

This app allows for contactless configuration of a universal gauge device. It enables users to set up instrument displays and transfer settings wirelessly with a simple tap.

**Highlights:** Contactless device configuration, Wireless settings transfer, User-friendly interface, Single or dual layout display, Alarm display, Supports engine sensor inputs, CAN interface for digital network data

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Propeller Calc free?

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

### Is VL Flex Configurator free?

VL Flex Configurator is free to download, with no in-app purchases.

### Which has better reviews, Propeller Calc or VL Flex Configurator?

VL Flex Configurator is rated higher. Propeller Calc averages 3.0 out of 5 from 1 ratings, while VL Flex Configurator averages 5.0 from 1 ratings.

### Do Propeller Calc or VL Flex Configurator have ads?

Neither Propeller Calc nor VL Flex Configurator shows ads.

### Which is updated more often, Propeller Calc or VL Flex Configurator?

Propeller Calc ships an update every 21 months, and VL Flex Configurator every 2 months. Most recently, Propeller Calc was updated on October 30, 2026 and VL Flex Configurator on October 24, 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.*