As a site employee you can send a request about your upcoming work requirement through mobile application, kindly refer the below image for better understanding.

You can request any kind to requirement related to your site work such as labor, material, equipment, vehicle etc…, also you can mention the required date for the work, Once you send request to company they can reply back to you with their response, at the same time you can track about the status of your request through your mobile itself.

Refer below image: