[aurizon]

App evolution is purely Darwinian. There is no $$ lock-in, so as soon as the user finds what he feels is a better one, yours is killed off. As to what is a better one, it might be that it has more functions, less crashing, easier to use, lower CPU burden, better marketing BS and so on - nothing stands still. So you have to fine tune your ap to make it evolve faster than the others into a better thing.