Comparison

Propeller Calc vs SmartCraft Manager

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Propeller Calc

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
Read full description

This calculator can determine pitch, gear ratio, RPM, propeller slip and speed parameters. Enter any four variables, and it will calculate the fifth. Use the toggle switch to choose which field to calculate. Pitch is the theoretical forward movement for one complete turn of the propeller. Every inch of the boat in contact with the water induces drag. Therefore, the distance travelled differs since the propeller is "slipping" behind the theoretical distance it should travel with each rotation. The difference between theory and reality is called slip. Depending on your application, slip typically ranges between 5% and 20%. A lower number is only sometimes what you are after. Slip of a prop changes with operating conditions and is not a direct measure of efficiency. Please consult professionals for guidance. Happy powerboating

About

SmartCraft Manager

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
Read full description

The Mercury Marine SmartCraft Manager is a one-stop solution available exclusively for authorized Mercury dealers and boat builders to configure SmartCraft-powered vessels using a mobile device. The app unlocks many industry-first features, including … - An intuitive dashboard that helps set up vessels remotely without the need for interacting with multi-function displays on the vessels, saving setup time and resources for boat builders, dealers and consumers - Industry-leading cloud-integrated IoT-type features along with easy over-the-air firmware and software updates - Easily repeatable configurations that save time and resources while configuring vessels - Ability to turn off CAN H functionality through the app on vessels equipped with SmartCraft Connect SmartCraft Manager serves as a central connection point to devices that link into the growing Mercury SmartCraft ecosystem.

Screenshots

Propeller Calc2 screens
SmartCraft Manager3 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard5 real differences · 5 level
Propeller Calc versus SmartCraft Manager: the parameters behind the verdict, then further details
ParameterPropeller CalcSmartCraft Manager
PriceFreeFree
Rating3.0 (1 ratings) — better1.2 (24 ratings)
Positive reviews100.0% of reviews — better0.0% of reviews
Number of ratings124 — better
Update frequencyEvery 21 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.012.2 — better
Further details — not scored
Size3 MB50 MB
Age rating4+4+
DeveloperFrode RørvikMercury Marine LLC

Customer experience

Propeller Calc

All ratings1 ratings
Positive0.0%
Neutral100.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

SmartCraft Manager

All ratings24 ratings
Positive4.2%
Neutral0.0%
Negative95.8%
Written reviews4 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Propeller Calc

No in-app purchases

None

SmartCraft Manager

No in-app purchases

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.

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