Native iOS + Android, React Native, or Flutter — each path has different cost + maintenance economics. Region pricing varies 2-4× across US / UK / IN / SG. Fourteen probing questions. Output: cost range, 12-week feasibility verdict, recommended stack. The 8-page memo includes the launch playbook + post-launch run cost.
Base cost per app type from 25+ shipped mobile builds (median 2024-2026). Stack multipliers: native iOS+Android = 1.7×, React Native = 1.0×, Flutter = 1.05×. Region multipliers map to median productized vendor pricing in that market. Feature additions: real-time chat, payments-by-region, offline mode, AI/ML features, custom hardware integration each add specified deltas.
React Native is the productized default — fastest to ship, easiest to maintain, no quality penalty for typical app shapes. Native (iOS + Android separate codebases) only when you need deep platform features or 60fps custom UI. Flutter for Google-shop preference + heavy custom design.
Median productized rate spreads ~3× from India (lowest) to US (highest) on equivalent senior engineering. The memo includes the exact bands by region.
Stack recommendation, feature scope, app-store launch checklist, post-launch run cost, region-by-region pricing benchmarks. About 8 pages.