What are some alternatives?
When comparing X-Transfer and AptBackup, you can also consider the following products
Save contacts - Save contacts app provides features through which users can select the desired data to create the backup in a variety of different formats.
Titanium Backup - Titanium Backup is a very old backup app that has been around since the early days of Android. In fact, it's one of the few apps that covers all versions from 1. Read more about Titanium Backup.
My Contacts by Captain Tushar - My Contacts is an app by Captain Tushar that comes up with features to help you in managing your contacts list so you can effortlessly delete or edit existing contacts.
oandbackup - Make backups of selected apps on your device and restore from those backups.
Contacts VCF - Contacts VCF app enables users to import contacts to the phone’s internal storage or to other storage devices to backup them.
Lucky Patcher - Lucky Patcher is a great Android tool to remove ads, modify apps permissions, backup/restore apps, bypass premium applications license verification, and more.