you got a wrong thinking of it.
no softwarehouse is sitting all day and look how to copy apps
so dont be fair of that just finish it publish it go on with new product
dont give up because a software house could copy it its a very wrong thought
and also if your app will be copied that doesnot means that users will not download your app
there is no magic trick that every app will be a success you just need to keep trying
i would success you to publish some apps to the market apps that has allready 100 of copies like a animal sound app
or flappy bird game (with some different pics and options) you have a very good sourcecode from andy mc for that
for those app you dont need to fair software houses because there are allready 1000's like them after a while you will realise that you are a small drop
in the ocean and no one is following your product to copy them and you will get motivation to continiue your real project
again my suggestion, make some simple apps, publish, get feedback and keep developing
(i would like to see you success like every other in this forum)
i think this is the best forum i have been. great support, great people, peace and harmony
no politics, just simple persons that share the same dream
be the president of america, i mean success with developing