Your app name should be something like "Invy - pick a date with friends and family" instead of just "Invy". Makes it much easier for people to see at a glance what it is, especially from screens with lists of apps. I think it also gives you a little SEO boost in the app store for those keywords.

I love the use of the white iPhones in the screenshots. That matches the design well and stands out from all the screenshots with black iPhones.