Auto Redial Pro

Ad supported free version is available at https://play.google.com/store/apps/details?id=com.srapps.autorediallite
Features:
1.Call a number again and again
2.Auto hangup each call after specific time given by user
3.Enable/disable speaker for calls
4.Stop further calls at any time.This feature also ends current running call.
5.Stop further calls at any time and continue with current call.This feature ignore time set for each call.So the call continue till the call ended manually by user.
6.Displays number of completed calls on screen

In case of dual sim mobiles please select a default sim to call in your phone settings before using the app

Please note that The OS might kill the app if it is out of resources.i.e app doesnt work well if your device has very less memory.In that case free some memory and try.