How and when i can make 50 -100 $ per day

I have 4 apps (one i will publish today) on Google play…I released them two week ago…
They have pretty good idea with beautiful design…
The question is:
How many apps i need to earn 50-100 $ per day… And what king of apps that helps me to get that target…
My app on Google play:
Please see. All apps…and reply is that enough and when will i see earning results?

Your link is broken.

The “Build and they will come” attitude is not applicable to App Stores anymore. No matter how beautiful your app is. It will get buried under tons and tons of apps submitted everyday. Especially when Google took out the “Just In” category. Without marketing, it just won’t work anymore.