I'm keen to map and measure the sizes of my paddocks and property myself. Is there an app or online software to do this?
Six Maps is good however, you cannot save anything but you can measure paddock sizes.
I think Agworld has these features and it's free, so that could be worthwhile looking into.
Then there is Agriwebb - that is a paid subsciption, however I think they offer a 14 day trial?
There is probably plenty more out there but they are the ones I know of and have used.
There is a long list of mapping/ farm management software avialable. If you want basic mapping without having to pay, try PA source. Maia grazing software also has a good mapping facility which i believe is available in the free version.