Cross-Platform IoT Control App

I need an end-to-end mobile application that lets users connect, monitor, and control their IoT-enabled devices directly from a smartphone. The app must run smoothly on both iOS and Android and be built with scalability, security, and performance at its core.

Key features I expect:
• Secure sign-up, sign-in, and token-based session management
• Simple device pairing, grouping, and renaming so users can organise their hardware quickly
• Real-time data streaming with clear charts or gauges for live readings and historical trends
• One-tap remote control for common actions (on/off, mode change, configuration tweaks)
• Push notifications for critical status changes or alerts
• A clean, intuitive UI that feels consistent across platforms and screen sizes

Technical considerations:
• Modular architecture that makes it easy to plug in new device types later
• Encrypted communication between app, cloud, and devices (TLS/SSL)
• Efficient background sync and offline handling to prevent data loss
• Codebase written in a cross-platform framework such as React Native, Flutter, or similar—open to your recommendation

Deliverables:
1. Source code with clear documentation and build instructions
2. Tested iOS and Android release builds ready for App Store and Play Store submission
3. Basic admin or backend panel (or hooks to an existing platform) for device and user management
4. Post-launch support for bug fixes during an agreed handover window

Show me relevant IoT projects you’ve shipped, outline your preferred tech stack, and provide a high-level timeline for MVP delivery.