https://thenextweb.com/apple/2020/06/22/apple-approves-hey-email-app-but-itll-have-to-submit-new-version-that-follows-app-store-rules/

Hours before Apple‘s developer conference WWDC kicks off, the company finally approved a new version of Basecamp’s much-talked-about email app Hey. However, this approval is seemingly on temporary basis till developers submit a version that adheres to App Store rules.

David Heinemeier Hansson, the co-founder of Basecamp, tweeted that Apple has approved Hey (v1.0.2) without the iPhone-maker’s in-app purchase option.  He added that the firm has also submitted a new version with a 14-day free usage sign up option for Hey.