MyHealthStorey
Private Health Diary & Family Records
A privacy-first health diary app where users track symptoms, medications, vitals, and medical history for their entire family — and share a read-only summary with their doctor before consultations. No third-party data sharing. Ever.
My Role
Lead Developer — React Native, Node.js backend, privacy architecture, and DPDP compliance
Project Type
Consumer Health App — Personal & Family Health Diary with Doctor-Sharing
Deliverables
React Native App (iOS + Android), Secure Backend, Admin Panel, Doctor Share Feature
Primary Stack
React Native · Node.js · PostgreSQL · AWS S3 (Encrypted) · Firebase
All Your Family's Health
In One Private Place
MyHealthStorey was built for a simple but powerful idea: every person should have a private, lifelong record of their own health — and their family's — that they completely own and control. No insurance company, no advertiser, no hospital system gets access.
Before a doctor visit, the user generates a time-limited read-only share link — the doctor sees the relevant history without accessing the full account. The link expires automatically after 24 hours.
❌ The Challenge
- Health data is extremely sensitive — must never leak
- Family members have different health profiles
- Doctor sharing must be time-limited and revocable
- Offline access needed when no internet
- Medication reminders must work reliably
✅ The Solution
- AES-256 encryption for all health data at rest
- Per-profile data isolation with family account
- Expiring tokenized share links with revocation
- Local SQLite for offline health logging
- Reliable push + local notification scheduling
Health Tracking That
Respects Your Privacy
Daily Health Diary
Log symptoms, mood, energy level, sleep quality, and free-text health notes every day. The diary builds a timeline that makes patterns visible — when symptoms started, what changed, what helped.
Medication Tracker & Reminders
Add medications with dosage, frequency, and duration. Get push notification reminders at the right time. Mark doses as taken or missed. View medication history to share with doctors during consultations.
Vitals Logging
Track blood pressure, blood sugar, weight, heart rate, oxygen saturation, and temperature over time. Automatic trend graphs show if vitals are improving or worsening — before your next doctor visit.
Family Health Profiles
Manage health records for up to 5 family members (parents, children, spouse) from one account. Each profile is fully isolated — separate medications, symptoms, vitals, and doctor visits.
Secure Doctor Share
Generate a time-limited, read-only share link for your doctor before a consultation. The link expires in 24 hours and can be revoked instantly. The doctor sees a clean health summary — never your full account.
Medical Document Storage
Upload and organise medical reports, prescriptions, lab results, and scan images in the app. All documents are AES-256 encrypted in AWS S3 and accessible only from your account.
Privacy-by-Design
Architecture
React Native
iOS & Android App
Node.js
Secure Backend API
PostgreSQL
Health Data Store
AWS S3 + KMS
Encrypted File Storage
SQLite
Offline Local Data
Firebase
Push Notifications
A Complete Health Diary,
Built for Real Families
per Account
Tracked
Capable
Data Sharing
Common Questions About
Health Diary App Development
How do you ensure health data privacy in a consumer app?
Privacy is built into the architecture, not bolted on. All health data is AES-256 encrypted at rest in the database, encrypted in transit with TLS 1.3, and files are stored in AWS S3 with KMS encryption. There is zero third-party analytics or advertising SDK in the app — no Firebase Analytics, no Facebook SDK. The app passes through DPDP Act compliance review before launch.
Can this type of app work offline?
Yes — MyHealthStorey uses SQLite for local data storage. Users can log symptoms, medications, and vitals without internet connection. Data syncs to the encrypted backend automatically when connectivity is restored, with conflict resolution for multi-device scenarios.
How does the doctor share feature work technically?
When a user generates a share link, the backend creates a time-stamped JWT token scoped to that specific profile's read-only view. The token expires after 24 hours, or can be manually revoked from the app. The doctor accesses a web view showing a curated health summary — no app download required, no access to the full account.
How much does it cost to build a health diary app like MyHealthStorey?
A full health diary app with family profiles, vitals tracking, medication reminders, document storage, and doctor sharing typically costs ₹8–14 lakhs. A simpler MVP with symptoms and medications starts from ₹4 lakhs. Contact TechEin for a free discovery call and fixed-price quote.
Want to Build a Health App
That Respects Privacy?
TechEin builds DPDP-compliant health apps where users own their data. If you have an idea for a health diary, symptom tracker, or family wellness app — we know how to build it right.