We all hate to copy Contacts manually from one Android device to our new phone. If contacts are not stored in a cloud Account as Google Account this App helps to transfer the contacts.
Often also needed, if you do not have an Acccount supporting Contacts. F.e. if you are using Device with Mobile Device Managment. Or you Mail Service is just IMAP not AES
Using dynamic QR Code to Transfer all Contacts from one Android to another