Mobile App Development Agency — iOS & Android Apps Built for Growth

A focused cross-platform app with onboarding, core workflows, REST API integration, push notifications, and store submission commonly ships in eight to twelve weeks. Consumer marketplaces with offline browsing, media uploads, and geolocation often land around ten weeks. Larger scope — multiple user roles, complex in-app payments, or heavy offline sync — extends toward twelve to fourteen weeks. Timeline includes discovery, design, build sprints, device QA, TestFlight and Play beta, and store review cycles — not just React Native coding. We provide a fixed-scope timeline after discovery. Store rejection and entitlement issues are planned for, not treated as surprises. Backend API work runs in parallel when needed so mobile is not blocked waiting for web-only teams.

We primarily build with React Native and Expo so one team ships both iOS and Android from a shared TypeScript codebase — faster and more maintainable for most growth-stage products. Platform-native modules are used where required for camera, biometrics, background tasks, or store-specific APIs. Fully separate Swift and Kotlin codebases are reserved for edge cases where React Native is not the right fit — extreme performance needs, deep platform-only features, or explicit client requirement. We advise honestly during discovery rather than defaulting to double the engineering cost. If you already have React web talent, React Native leverage is high. The goal is App Store credibility and reliable releases, not ideological purity about native versus cross-platform.

Cost depends on screen count, backend integration depth, offline requirements, media handling, and whether in-app purchases or subscriptions are in scope. After discovery we deliver a fixed-scope quote for the first App Store and Play Store release rather than open-ended hourly billing. Most founders budget for an eight to twelve week build when iOS and Android launch together with a production API. We align scope to your runway so v1 proves mobile traction without funding features users have not requested. Compare proposals on parity: auth flows, push, analytics, crash reporting, and submission support are often omitted from cheap quotes. Mobile MVPs should be production-grade on the core path even when secondary screens are thin.

Our default stack is React Native with TypeScript, often Expo for faster iteration and over-the-air updates where appropriate. Firebase or your existing backend handles auth and push notifications via FCM and APNs. REST or GraphQL APIs connect to your systems of record with token refresh, typed clients, and upload compression for media. We add offline caching, deep linking, crash reporting, and analytics hooks as part of production readiness — not stretch goals. If you already use Firebase, Supabase, or a custom API, we integrate rather than forcing a parallel backend. Staging builds via TestFlight and Play internal tracks are standard so stakeholders review on real devices before public launch.

Yes. Most engagements connect to an existing REST or GraphQL API with token-based auth, refresh flows, and versioned client layers. Mobile does not require rewriting your web backend — we define the API contract, handle mobile-specific concerns like background upload, pagination, and optimistic UI, and coordinate on rate limits and breaking changes. Shared business logic stays on the server; the app focuses on presentation, device capabilities, and resilient networking. If gaps exist in the API for mobile needs, we scope backend additions explicitly rather than hacking around them in the client. Documentation and handoff help your web team maintain parity as features evolve across platforms.

Yes. We prepare store listings, screenshots, privacy nutrition labels, permission rationale, and review response drafts. Beta distribution runs through TestFlight and Google Play internal or closed tracks before public launch. Store rejection cycles are built into the timeline so marketing dates stay realistic. We handle provisioning profiles, signing, and release channels — founders should not lose a week learning Apple bureaucracy during a launch window. Post-launch we monitor crash reports and review feedback for hotfixes. If your MVP is mobile-first, store presence is often part of credibility with users and investors; submission support is part of delivery, not an optional extra you discover at the end.