// build_guide
// How to build Doctor Appointment & Video Consultation App
Healthcare is one of the few sectors where users tolerate friction — they need trust signals, not just UX. React Native gives cross-platform reach in a market split 60/40 Android/iOS. Storing PHI (patient health information) in AWS Mumbai satisfies data localisation norms. The booking engine must handle clinic slots (15-min granularity) + on-demand video queues simultaneously. NestJS modules map cleanly to each domain: appointments, prescriptions, health records.
Complexity 9/10Mobile App
// recommended_stack
FrontendReact Native + Expo
BackendNestJS
DatabasePostgreSQL
AuthSupabase Auth (phone + Aadhaar OTP)
HostingEAS Build + Railway (Mumbai region)
Extra100ms (video)
ExtraRazorpay
ExtraAWS S3 (PHI storage, India region)
ExtraTwilio (SMS OTP)
// cost_and_timeline
USD min
$32,000
USD max
$52,000
INR min
₹29.9L
INR max
₹48.5L
Typical Mobile App projects cost $7,000–$24,000 USD and take 12–20 weeks with an Indian dev team. See the full cost guide →
// timeline_breakdown
3 weeksAuth, doctor profiles & slot booking
4 weeksVideo consult, chat & prescription engine
3 weeksHealth records, PHI storage & payments
3 weeksAdmin, payout, compliance review & store submission
// mvp_features[]
## What to build in the MVP
—Doctor discovery by specialty, location and availability
—Slot booking for in-clinic visits with confirmation SMS
—Video consultation with 100ms, in-app chat during call
—Digital prescription generation and PDF download
—Basic health records vault (reports, test results upload)
—Doctor payout dashboard with Razorpay Route
// risk_flags[]
## Engineering risks to plan for
!Telemedicine apps in India require compliance with Telemedicine Practice Guidelines 2020 — get legal sign-off before launch.
!PHI must be encrypted at rest and in transit; AWS KMS + S3 SSE-KMS adds complexity but is non-negotiable.
!App stores apply heightened scrutiny to health apps — budget 2-3 extra weeks for review cycles.
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// related_resources