Keyword SEO help

Hi community,

I finished my Android app SafeChoice recently.

I really need someone to help me with keywords (SEO) to get more organic installs, as at the moment all of my installs are from advertising.

I have done some research online and it seems easy enough, but I am new to this and I am due to start a new job soon so I lack time. As you can see by the app I just want to help people, so can someone please help me do that?

I have PM, email, skype