Google has offered its own basic device backup/restore tool as part of Google Play Services for years, and an actual migration tool is present on Pixel devices (which allows for USB transfer from iPhones, among other improvements). OnePlus has now released its own migration tool, simply titled ‘OnePlus Switch.’
The app can be installed on any Android device running Lollipop (5.0) or higher, but a OnePlus device is required as the target. OnePlus says it can transfer contacts, SMS messages, call logs, calendars, photos, videos, audio, and apps (but no app data).
By comparison, the auto-backup feature offered by Google copies your apps (with data if the app supports it) and device settings, and only works on Android 6.0+. If you have a Pixel device, Google’s auto backup also works for call history, local contacts/calendar, photos/video (through Google Photos), and SMS messages.