Hello and welcome to Android Forums. What voice app and what device? These are the two questions we will need to know in order to offer help or to direct you to the area here at Android Forums where help can be found. Below are links to the phone and tablet areas. You might find your device within those lists and check out the area for help. We also have an area where we discuss Android apps and I will leave you with that link as well. Best of luck to you and thanks for joining this community.