
I created an iPhone / Apple Watch sailing speedometer app which works well for dinghy sailing
I often sail boats without any instruments - not always dinghies but sometimes (more often Rhodes 19s and J80s). I had been using various apps to measure my speed so I could play around with trim and see the impact, but they were either super unreliable (the watch app would keep closing while sailing), or they were too expensive and wanted to make me pay ever increasing subscription fees for no added value. So I created my own app. It worked so well for me so I decided to make it public.
HullSpeed is designed to be straightforward and legible, not too many bells and whistles yet, just speed, distance, heart rate. It has a big display you can see at a glance, and after a voyage you can see a map of where you sailed. You can export to Google Earth and plot a speed or heart rate map as well.
I am curious what all of you dinghy sailors on Reddit think. Is there any specific feature you'd like to see in the future?