Mobile App Development for Psychologist / Therapist
A client books a session at 22:47. Not because of emergency — just convenient after work. The app must provide booking, reminders, secure chat, and payment options — without calls to the admin and without data leaks. This is where most "simple" solutions start breaking at the seams.
Why Standard Templates Don't Fit
Therapy apps handle personal data in a special category — Federal Law 152-FZ, Article 10. This isn't just "add SSL". Storing session history, diagnostic notes, audio recordings requires encryption at storage level and separate data processing policies.
Common problem: a developer takes Firebase Realtime Database, enables standard rules, and a month later discovers client data is technically accessible via Firebase console if the service account is compromised. For medical apps, this is critical.
Second pain point — video sessions. WebRTC via Agora SDK or Daily.co works stably on 4G, but switching from Wi-Fi to mobile network breaks the session if ICE restart isn't implemented. Users see a frozen screen — and leave. For therapy, this is also an emotional hit mid-session.
How to Build This
Stack: Flutter 3.x + Dart, Laravel or Node.js backend, PostgreSQL with encryption of sensitive columns via pgcrypto, video via Daily.co REST API + WebRTC SDK.
Specialist schedule — separate module with time slots, buffer intervals between sessions, sync with Google Calendar via Calendar API v3. Client sees only available slots. Therapist manages schedule in web cabinet or directly in the app.
For chat, use Stream Chat SDK — it provides end-to-end encryption out of the box, message history, read indicators. Flutter integration takes about two days. Alternative — custom WebSocket server on Laravel Broadcasting + Pusher Channels if you need full infrastructure control.
Push notifications via Firebase Cloud Messaging: reminders 24 hours, 1 hour, and 15 minutes before session. Clients confirm participation directly from notifications — reduces no-shows.
Online payment via YooKassa or Robokassa: create payment intent on server, confirm via webhook, credit specialist account minus platform commission. Refunds — automatic on cancellation later than 2 hours.
From practice: when developing a similar app for a psychology center network, we discovered Daily.co blocks mic on background on some Android devices (Xiaomi MIUI 12). Solution — foreground service with "Session in progress" notification to keep audio stream active. Without it, 30% of calls dropped on Android.
Key Modules
- Specialist profile: specializations, education, certificates — all editable via CMS panel
- Pre-session client form with data processing consent (PDF via pdfmake)
- Secure session journal with protected therapist notes (specialist access only)
- Optional mood diary for client with trend visualization via fl_chart
- Referral program and promo codes
Process and Timeline
Start with requirements audit: determine if multi-specialist model (aggregator) or app for specific specialist/practice. Architecture depends on this.
Stages: requirements & UX prototype → Figma design → development (Flutter + backend) → QA on real devices → App Store and Google Play → support.
MVP with booking, video sessions, and payment — 8 to 14 weeks depending on scope. Aggregator with personal cabinets, analytics, and extended CRM — 20+ weeks.
Pricing is calculated individually after requirements analysis.