# Propeller Calc vs SmartCraft Manager

The clearest difference is review sentiment: Propeller Calc at 100% against SmartCraft Manager's 0%. Propeller Calc also leads on rating (3.0 vs 1.2). SmartCraft Manager's advantage is update cadence (every 3 months vs every 21 months) and ratings volume (24 vs 1). 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.

Propeller Calc holds the better App Store score, 3.0 against 1.2. That said, the two scores are not equally well evidenced: SmartCraft Manager has 24 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of Propeller Calc's written reviews are positive against 0% of SmartCraft Manager's.

Propeller Calc ships an update every 21 months, SmartCraft Manager every 3 months. The most recent releases landed on September 26, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Propeller Calc | SmartCraft Manager |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/propeller-calc/id478119478/reviews)** | [1.2 (24 ratings)](https://appshunter.io/ios/app/smartcraft-manager/id1544487941/reviews) |
| Number of ratings | 1 | **24** |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 3 months** |
| Monetization | Free | Free |
| Size | 3 MB | 50 MB |
| Requires iOS | 17.0 | **12.2** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Frode Rørvik](https://appshunter.io/developer/478119481) | [Mercury Marine LLC](https://appshunter.io/developer/1777822540) |

## 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


### SmartCraft Manager

[App page](https://appshunter.io/ios/app/smartcraft-manager/id1544487941)

This app allows authorized Mercury dealers and boat builders to remotely configure SmartCraft-powered vessels. It offers an intuitive dashboard for setup, cloud-integrated IoT features, and over-the-air updates, streamlining the configuration process.

**Highlights:** Remote vessel configuration, Intuitive dashboard, Cloud-integrated IoT features, Over-the-air firmware updates, Repeatable configurations, CAN H functionality control

**In-app purchases:** none


## Frequently asked questions

### Is Propeller Calc free?

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

### Is SmartCraft Manager free?

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

### Which has better reviews, Propeller Calc or SmartCraft Manager?

Propeller Calc is rated higher. Propeller Calc averages 3.0 out of 5 from 1 ratings, while SmartCraft Manager averages 1.2 from 24 ratings.

### Do Propeller Calc or SmartCraft Manager have ads?

Neither Propeller Calc nor SmartCraft Manager shows ads.

### Which is updated more often, Propeller Calc or SmartCraft Manager?

Propeller Calc ships an update every 21 months, and SmartCraft Manager every 3 months. Most recently, Propeller Calc was updated on September 26, 2026 and SmartCraft Manager on October 11, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*