Arduino Nicla and on board sensor interface.

My project is to utlize the arduino Nicla board for a battery powered measurment device. The device needs to interegrate both the acceleramtor and gyroscope outputs onto 1 stable and highly accurate output. I then need the output to display on the device itself as well as over BLE. I WOULD LIKE the devices display to be under 2.5in in size as well as have capability to either reset and hold a zero point, or be able to save a angle as a reference.

Please ask for YouTube link to device animation for additional details and specs.