I invested time in App store seo. Picking out the right keywords, etc.
Other than that I just let them fly. Every once in a while I change them to free to get a batch of downloads and some reviews. Sometimes sites will pick them up for "Free app Fridays" or something.
tumira that's 200-500 a month.
Here is a link to one that is usually .99 but I am running for free until Saturday. https://itunes.apple.com/us/app/word-search-for-kids-2-perfect/id693620862?ls=1&mt=8 You can see the other games if you scroll down and see "other games by this developer" Everything was done in C2.
The latest game (word search for kids 2) I spent 200 dollars on hiring an artist for the graphics, then rest was a bit of time reworking the original word search for kids.
What are you asking for the application process?