iPhone, Android, or one build for both
Some products should launch on one store so you can learn from real use. Some have to be on iPhone and Android on the same day, because the audience is split. We say which of those is true for your users before anyone writes code.
An iPhone-first build is covered under iOS app development. A shared build for both stores is cross-platform app development. Android ships in both of those paths. We will tell you when a separate Android build is the better call.
