VoIP Assistant is a companion to a VOIP.MS account. Use your Android device to see who's called your VoIP number. Users must have a valid VOIP.MS account and API credentials for this app to work. Purchase the premium version to create and change phone entries, manage call filters, block telemarketers, use your DISA line, forward to a number or ring group, monitor for account registration status and more... NOTE: If you're having trouble getting this to work please email me for help instead of just rating the app poorly.