A business app is a client plus a backend. These notes cover stores, native vs shared UI, and what a first version usually contains.
Employee tools, customer portals and channel apps are three information architectures. If your users already live in WeChat in China, read the mini program guides first. App Store and Play are a different critical path.
Clients, backend, stores and compliance. An IPA or APK without APIs is not a product.
Login, lists and a simple transaction: often 8–14 weeks of engineering plus store review.
Who owns the backend, how versions ship, and whether they have survived store review.
Native dual-track vs cross-platform is a product decision, not a religion.
Who opens the app first, what the API must keep compatible, then devices and stores.