On Android, open the Google Play Store app and navigate to Top Charts at the top of the screen. You'll be able to see Top Free Apps as one option, and you can also search for specific apps to find out if they're free.

to shake tremulously; quiver or tremble: He stood there quavering with fear. to sound, speak, or sing tremulously: Her voice quavered a moment and then she regained control.

cockamamie. / (kRkYmejmj) / adjective. slang, mainly US ridiculous or nonsensical: a cockamamie story.