You can do a poll and see for yourself that this is highly wanted! Which will help cost too! :) It could be a one time paid version currently. And it can received updates over time. You be a very strong competitor to others who have offer only subscription for advance features. :(
So you could offer a one time price right now and strip down the free version to the very basic. So those who pay a one time fee can have all the things we see in the free service. :) I think that is fair and a real good deal. Like with google apps you pay a one time fee for more advance features.
Map services you get on google has this the free version is very limted and if you like it just pay a once fee for more features.
Income will mean that you can concentrate on it more then just having it just free with no income.
Hi - thanks for your suggestion. We have lots of plans and ideas we would like to pursue for plotaoroute.com, so we definitely intend to add more features over time - it's really just a matter of time and investment. Offering a paid for version of the service with extra features is something we might consider, but it would probably need lots of upfront investment to develop those extra features and we would need to carefully consider whether there would be sufficient demand for this to be a viable investment. At present our focus is really on building and improving the free service we offer.
I think it would be so good if you can have a one time fee to help cost. So viewers could have more features with a paid app? Perhaps able to download on computer? That way they can be more updates and fixes? If the software can be bought. Thanks!