you can Use this App If you are Driving car.
Or if you are on Bike having Bluetooth.
App is having Loudspeaker Auto on/off feature
This app Auto Answer for Call Will help you a lot!
Option for Select Answer for which calls Automatically like All Callers ,Caller Which are my Contacts Or Callers which are White-listed or starred.
Option for Set Timer to Auto pickup the call after some specific delay , like 2 second,5 second.
Option for Enable Auto Loudspeaker or not.
Option for Using it with Bluetooth headset.
Option for Disable Auto Attend Calls, If you are talking on Phone