App development agencies: hire a mobile / product team

You own the product constraints: target platforms, UX bar (gestures, offline, camera, performance), timeline, and whether you already have native talent to maintain the code. A good agency recommends a stack — native Swift/Kotlin, React Native, Flutter, or a PWA — against those constraints and walks you through trade-offs in plain language. Distrust shops that push one stack for every project without asking about your users, release cadence, or who will own the codebase after launch.

Focused MVPs often run 8–16 weeks from kickoff to a store-ready build; thicker v1 products stretch longer when integrations, design systems, or compliance are in scope. After launch, many teams move to a retainer or dedicated product squad for iteration rather than a one-shot fixed bid. Align every milestone to a release you can actually ship and validate with users — demos without a path to production burn budget without proving demand.

Put work-for-hire and assignment language in the MSA/SOW so code, designs, and docs transfer to you on payment (or as specified). Require your Git org, CI, App Store / Play Console, analytics, and cloud accounts — credentials should live under your company, not only the agency’s. Keep a written list of who can revoke access at handoff, and avoid “agency-owned” SDKs or templates that block you from switching vendors later.