How to filter App Store searches?

Sometimes I need to search by categories, Apple has added that function. There are categories available such as: Photographs, Games, Music, and more.

Other times I'd like to "see only", or "hide":

• Subscription model
• One time purchase
• Free apps
• No adds

This will really help to find the apps I want.

Is there any way to do this? Maybe a special search word?