Hi,
For auto increment of push badge count you need to send a JSON like {"badge":"increment"} , this will increment push badge count by 1 everytime and to reset the value of push badge count you can use method of iOS like updatePushBadgeforDevice and updatePushBadgeforUser .
updatePushBadgeforDevice – This method is used to update push badge count of particular device registered of that user .
updatePushBadgeforUser – This method is used to update push badge count of all device of the user, for e.g. user having multiple device registered with same name
Thank you!