Vital Signs Tracker is a modern and complete Android application for monitoring vital health data, developed 100% in Java, compatible with Android SDK 29 up to 36, and built following best practices such as MVVM architecture, Room Database, and LiveData.

It is ideal for personal use, family health tracking, or as a solid foundation for health, wellness, and fitness-related projects.

⚠️ Important Medical Disclaimer / Legal Notice ⚠️

This application (VitalSignals / Vital Signs Tracker) is intended strictly for personal tracking, record-keeping, and general wellness purposes only.

This application is NOT a medical device, and it does NOT provide medical advice, diagnosis, or treatment. The information collected or presented by the app is not a substitute for professional medical assessment, diagnosis, treatment, or consultation with a qualified healthcare professional.

ALWAYS seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read in this application or its description.

Key Features

Vital signs recording and history
- Blood Pressure (Systolic / Diastolic)
- Heart Rate
- Body Temperature
- Body Weight
- BMI (Body Mass Index)
- Blood Glucose
- Oxygen Saturation (SpO₂)
Automatic health status analysis
- Intelligent classification (Normal, High, Low, etc.)
- Visual indicators with colors based on measured values
- Reusable logic for health evaluation (Blood Pressure, BMI, Temperature, etc.)
Multi-profile support
- Create and manage multiple members
- Profile photo support
- Last selected profile is automatically saved and restored
Smart Home Dashboard
- Displays the most relevant recent measurements
- Modern card-based layout with value, date, and status
- Motivational and health-related phrases (fully internationalizable)
Complete History Screen
- Sectioned list grouped by vital sign type
- Quick filters: Last 7 days / Last 15 days / Last 30 days
History
- Historical comparison of measurements over time
BMI Calculator with semi-circle gauge
- Animated indicator
- Automatic category coloring
- Weight difference compared to ideal range

Data Export (Strong Selling Point)

PDF Export
- Printable A4 report
- Organized by vital sign type
- Member name included
- Generation date included
CSV Export
- Compatible with Excel and Google Sheets
- Perfect for external analysis or sharing with healthcare professionals
Export options available from the Settings screen (keeps History screen clean and lightweight)

Architecture & Technologies

100% Java
Android SDK 29 → 36
MVVM (Model–View–ViewModel)
Room Database
LiveData
ViewModel
SharedViewModel (global state management)
Bottom Navigation with Fragments
Material Components
Sectioned RecyclerView
PdfDocument API (PDF export)
SharedPreferences
Internationalization ready (i18n)

UI / UX

Modern dark theme
Rounded cards
Vector icons
Animated filter chips
Responsive layouts
Empty states prepared (Lottie-ready)

Internationalization

Fully prepared for multiple languages
All texts centralized in string resources
Easy to expand to new markets

‍ Clean & Extensible Code

Well-structured and readable codebase
Clear separation of responsibilities
Easy customization:
- Add new vital sign types
- Modify health status rules
- Customize layouts
- Extend export reports

Perfect for: Android developers, health & wellness startups, academic projects, fitness and lifestyle apps, and non-clinical medical-related applications.

⚠️ Important Notice

This application does not replace professional medical evaluation. All displayed data is for informational purposes only.

What’s Included

Full source code (Java)
Room database implementation
XML layouts
PDF and CSV export utilities
Ready to build in Android Studio

Download Demo APK

Click here to download the demo APK

Customer Support

I offer professional post-sale support. I care about your app as much as you do and I’m here to help you in every way possible.
Support Hours: 10:00 – 17:00 (UTC+05:45), Monday to Friday
Free Lifetime Updates: Get all future improvements and features free of charge.

For support or customization, contact: ddquixote@bol.com.br

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Vital Signs Tracker – Android App (Java, SDK 29–36)