It is around 2kg total, including box, cushion and other small gifts from us.
Yes. It will work with Apple Healthkit.
One month battery life.
Yes. It will support all Android Phone with Bluetooth 4.0.
Yes. The data is encrypted all the way from hardware to phone to server.
Yes. It will have a small LED to show whether the battery is fully charged.
Don't see the answer to your question? Ask the project creator directly.