If your business serves customers in Vietnam, Zalo is not optional. With over 75 million monthly active users and deep integration into daily communication, it is the most efficient distribution channel available — and Zalo Mini Apps let you reach those users without asking them to install anything new.

A Zalo Mini App is a lightweight application that runs inside Zalo itself. Think of it as a web app with native access to Zalo's user graph, payment infrastructure, and notification system.

Day 1–5: Foundation

The first week is architecture and setup. You need a Zalo Business Account, an approved developer account on Zalo Open Platform, and a clear answer to one question: what is the single most valuable action a user should be able to take in this app?

Common first-use cases: booking, ordering, loyalty points check, appointment confirmation. Pick one. Resist scope creep — a focused mini app ships in 30 days; a comprehensive one ships in 120.

Day 6–15: Core build

  • ZMP (Zalo Mini Program) uses a React-like component model — familiar to any web developer.
  • Zalo Pay integration is straightforward if you have already registered as a merchant. Allow three days for merchant onboarding if you have not.
  • User identity is automatic: Zalo handles authentication. You get a stable user ID and, with permission, basic profile data.
  • Push notifications via OA (Official Account) are among the most effective in Vietnam — open rates above 60% are common for transactional messages.

Day 16–24: Integration and testing

This is where the real work happens: connecting the mini app to your backend, handling edge cases, and testing on actual Zalo devices (Android and iOS behave differently). Zalo provides a preview QR code for internal testing before you submit for review.

Budget more time for Zalo platform review than you think you need. First submissions often come back with UX feedback specific to Zalo's design guidelines.

Day 25–30: Review and launch

Submit for Zalo review. The process typically takes 3–5 business days for a first submission. Have a checklist of common rejection reasons ready: missing privacy policy page, incorrect use of Zalo Pay branding, UI elements that do not meet minimum touch target sizes.

What comes after launch

The mini app is not the product. It is the distribution layer. The product is the experience. After launch, focus on the two metrics that matter most: task completion rate and return visit rate. Everything else follows from those.

30 days is achievable for a focused, well-scoped mini app with a team that has built on the platform before. Allow 45–60 days if this is your first Zalo deployment.