Great App even for RC Boats
I use this App for assistance with prop selection on my RC Nito Boats. Use ratio 1 (1:1) and the rest is simple. It works well for full size boats too.
Free
About
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.
✓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
Show original description
What's New in Propeller Calc
3.2
July 9, 2025
GUI changes and minor enhancements.
User reviews
FAQ
What can Propeller Calc calculate?
Propeller Calc can determine pitch, gear ratio, RPM, propeller slip, and speed parameters. You can input any four of these variables, and the app will calculate the fifth for you.
Is Propeller Calc free to use?
Yes, Propeller Calc is completely free to download and use. There are no in-app purchases or advertisements.
What devices does Propeller Calc support?
Propeller Calc is available for both iPhone and iPad devices.
How often is Propeller Calc updated?
The app was last updated on July 9, 2025, indicating ongoing support and potential for future improvements. The current version is 3.2.
What is the age rating for Propeller Calc?
Propeller Calc has an age rating of 4+, making it suitable for a wide range of users.
What does propeller slip mean in Propeller Calc?
Propeller Calc helps you understand propeller slip, which is the difference between the theoretical distance a propeller should move and the actual distance it travels due to drag. This typically ranges from 5% to 20%.
Who developed Propeller Calc?
Propeller Calc was developed by Frode Rørvik.
What is the user rating for Propeller Calc?
Propeller Calc has a rating of 3.0 stars based on 1 rating.
