Can’t believe this is the first review. This is a simply excellent little app to generate polar diagrams for sailing boats from basic information about the boat.
Unlike racing yachts and newer cruisers there are many cruising boats without this information from the manufacturer and it is quite a lot of work to derive it experimentally, beyond many casual sailors. So 5* for an inexpensive, intuitive and easy to use app which does exactly what it needs to do: generate a set of estimated sailing polars to use as a starting point for better sailing.
One feature I would request, if development is still being supported, is to be able to generate a single polar graph with a summary of several sets of curves, say 4, 8, 12, 16, 20, 30 kts for example. At the moment each wind speed has to be viewed one at a time which is fine if using the app but less useful on board when a single page printout would be useful. Although the entire data set can be exported as a simple csv file the common spreadsheets like Excel and Numbers provide absolutely no support for polar data plotting and it seems all of the (many) graph charting apps that do support polar diagrams expect the use of equations to generate the curves not an R/theta data set. Unbelievable, really, in this day and age and very frustrating when trying to handle this highly useful data.
PDF output of the polar graphs and data table would also be useful, saves a lot of screen grabbing on the iPad.
Finally, as a cutter owner, is it possible to include support for a cutter rig or at least an explanation of how to accommodate this sailplan in the sail area calculations?
I have spread the word amongst fellow cruising boat owners who have been looking for something like this for years and encouraging them to buy it, so I hope more purchases and feedback follows.
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Whitehall Bill
skyehelmsman
Grey Dad