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### 🔑 **Core Features & Services**
1. **Digital Aadhaar Access**:
- Carry a **soft copy** of your Aadhaar instead of a physical document.
- Download e-Aadhaar (regular or masked) for offline use.
2. **Profile Management**:
- Store **up to 5 profiles** (for family members) linked to one registered mobile number.
- View Aadhaar details by entering a 4-digit password.
3. **Update Services**:
- **Address updates** with document proof (other demographic updates require visiting Aadhaar Seva Kendra).
- Track update status and history.
4. **Security Tools**:
- **Biometric Locking/Unlocking**: Temporarily disable biometric authentication to prevent misuse.
- **Aadhaar Locking**: Securely lock your UID number.
- **TOTP (Time-based OTP)**: Generate temporary passwords instead of SMS-based OTPs.
5. **Verification & eKYC**:
- Verify Aadhaar validity, email, or mobile numbers.
- Share **password-protected eKYC or QR codes** for paperless verification.
6. **Additional Utilities**:
- Locate enrollment centers, order PVC Aadhaar cards (₹50 fee), retrieve lost UID/EID, and book appointments.
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### 📱 **How to Set Up & Use mAadhaar**
1. **Installation**:
- **Android**: Via [Google Play](https://play.google.com/store/apps/details?id=in.gov.uidai.mAadhaarPlus) (Android 5.0+).
- **iOS**: Via [App Store](https://apps.apple.com/in/app/maadhaar/id1435469474) (iOS 10.0+).
2. **Registration**:
- Open the app → Tap "Register My Aadhaar".
- Enter Aadhaar number or scan QR code → Verify via OTP sent to your **registered mobile number**.
- Set a 4-digit security password.
3. **Key Operations**:
- **Update Address**: Go to "Main Service Dashboard" → "Address Update".
- **Lock Biometrics**: Navigate to "My Aadhaar" → "Lock Biometrics".
- **Check Update Status**: Use "Request Status Services" .
4. **Profile Deletion**:
- Go to "My Aadhaar" → Select profile → Tap "⋮" → Choose "Delete" .
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### ⚠️ **Important Considerations**
- **Mobile Number Requirement**: The SIM linked to your Aadhaar **must be in the device** for OTP verification and app functionality.
- **Language Support**: Menu available in **12 Indian languages**, but inputs accept **English only**.
- **Data Safety**: UIDAI states **no data collection**; however, users must grant SMS permissions for OTP auto-read.
- **Common Issues**:
- **Server Errors**: Frequent "server unreachable" messages during peak times.
- **Profile Sync Delays**: Updated profiles may not reflect immediately after changes.
- **iOS Compatibility**: Some features (e.g., TOTP) may glitch on older iOS versions.
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### 🔍 **Troubleshooting & Tips**
- **Biometric Unlocking Failure**: Ensure app permissions for camera/fingerprint are enabled.
- **OTP Not Received**: Confirm mobile network/SIM compatibility; use TOTP as backup .
- **App Crashes**: Reinstall the latest version (v3.9.0+ supports PVC card orders via SID) .
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### 💡 **Benefits & Limitations Table**
| **Pros** | **Cons** |
|----------|----------|
| ✔️ Paperless verification via eKYC/QR codes | ❌ Server instability during high traffic |
| ✔️ Home-based address updates | ❌ Complex UI navigation |
| ✔️ Enhanced security with biometric locking | ❌ No regional language typing support |
| ✔️ Multi-profile management | ❌ Mandatory SIM requirement |
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### **Conclusion**
The mAadhaar app enables **secure, remote management** of Aadhaar services, reducing dependency on physical documents and enrollment centers. While occasional technical issues persist, its features—like biometric locking and eKYC—significantly enhance convenience and security. For enrollment center visits or major updates, use the "Locate Enrollment Center" feature or UIDAI’s [portal](https://uidai.gov.in) . Always ensure your mobile number is registered with Aadhaar for full functionality.