Homepage for first time users has multiple touchpoints for inviting

Login with phone number

Find friends on Facebook

Homepage once you start using the app and have a few rooms

Splash screen

Invite friends who are not on the app yet

Create profile

Chat room and coachmark for slides

Bookmarking places, accessing bookmarks

Practice tab and all topics

Recipe detail screen. When you tap add to cookbook, it prompts you to login or signup

Menu screen with sticker sets