bhnmmhmd

This has happened to me. I was learning Haskell until finally the pressure of "how will this help me pay bills" persuaded me to stop and learn Python instead. Even with Python there's the pressure of "I can't make an online sideproject by it" which has tempted me at times to switch to JS, but I've resisted that so far.

This.

I studied Electrical Engineering and in my experience, the only thing my classmates cared about was the technical aspects of the field, and often they couldn't see the big picture. Great talents of course, but more like robots, not even capable of understanding the humanitarian aspects of life. Such a waste.

Disclaimer: It's just my experience, not necessarily true for all engineers and engineering schools.

TL;DR:

Sell it per download.

Why?

If it is to be run in areas that rarely have access to the internet, then your target market isn't probably interested in buying a license or any thing that even remotely makes the app hard to use.

Go easy on your customers. From the moment they visit your website to the moment they have the app up and running should not take more than 3 clicks. Just my 2 cents.