We've tried plenty ways to make this happen:
1. append a footer in the email asking for a review Finding: People ignore it.
2. include custom copy in the emails asking for a review People say yes yes, and then most do nothing.
3. The annoying rate us with stars popup and redirect to appstore. People rate 5 stars inapp, and then close down the AppStore before they apply a rating
Getting reviews is hard for b2c - but the real issue at work is the amount of friction AppStore imposes. I've tried to leave reviews and it asks me to re-sign in to the AppStore, minimum character requirements (can't just leave 5 stars).