Add sensor component

I want to add a motion sensor and stationary sensor component in the MIT app inventor in the GSoC project. Is this a good idea to add a sensor component? can you give me some suggestion about this project


This is what Google says about motion sensors

Be aware there are different types of hardware that can detect motion built into phones. Not all phones have the necessary hardware.

I don't know what a stationary sensor component is. What phone hardware does it use?