You may say the iOS and Android apps must be the same. Different platforms but identical products, right? But why? That’s an artificial rule. If one releases a week or two or even three before the other, who cares?

Oh, it turns out the shared code that implements our app breaks on Android, and we didn’t notice, and the fix is going to require the iOS app to change, which requires another round of testing and developing.

I’m not saying that the general idea isn’t great, but sometimes dependencies, even artificial ones, are okay.