frez-dong/crimpdeq-app ? reverse-engineered prompt

Build me a Flutter app for Crimpdeq, a Bluetooth low energy finger strength device.

I want a simple development tool that can scan for the device, connect to it, and show live weight readings as they come in. It should also include a clear chart so I can watch the measurement over time, and it should work with the Tindeq Progressor style of API since the firmware uses that kind of communication.

Make it run on Android, iPhone, desktop, and web, and handle the needed Bluetooth permissions or browser support in a sensible way. A clean, easy to use screen for connecting, starting and stopping measurements, and viewing the data would be enough. If anything is unclear, check the current docs online and make the app match the Crimpdeq firmware service UUID and BLE behavior.