Num Sum makes sharing your call history between devices effortless, secure, and fast. Acting as the perfect companion to Call Sync, Num Sum securely encrypts your call data and transfers it to trusted devices with just a one-time connection. Whether you’re switching phones, collaborating with colleagues, or simply staying in sync, Num Sum ensures that your call records are shared securely and reliably.
🔒 End-to-End Encryption: Your call data is fully encrypted before it leaves your device and can only be decrypted by the connected Call Sync app. Not even we can access it!
☁️ Cloud-Based Syncing: Sync your call history to Firebase Firestore with zero manual effort. Your data is automatically uploaded and downloaded securely.
📜 Comprehensive Call Records: Includes call type, duration, timestamp, contact name, or phone number (when no contact is available).
🤝 One-Time Connection: Establish a secure, one-time pairing with Call Sync for ongoing, seamless synchronization.
🗑 Automatic Data Cleanup: Unsynced data is deleted from the cloud after 90 days of inactivity. Data is also automatically removed upon user sign-out.
⚡ Works Across Devices: Switching phones? Num Sum ensures your call data transfers effortlessly between devices.
🛡 Privacy First: Data is only used for syncing and not shared with any other services. The app also uses trusted third-party services like Google Play Services, Firebase Analytics, AdMob, and Firebase Crashlytics to enhance functionality and reliability.
- Hassle-Free: Save time with automated syncing.
- Secure: Feel confident with top-tier encryption technology.
- Reliable: Trusted Firebase infrastructure ensures smooth and error-free operation.
Start syncing your call history securely with Num Sum and experience seamless cross-device connectivity!
- Third-Party Libraries
- Third-Party Web Service
This repository is just to showcase my personal project. The repository will not accept any pull requests. Anybody is free to use the code for learning purpose only.





