There is only one file type that uses the .JTBACKUP extension:
Just Type Backup File
File created by Just Type, an iOS app used for storing personal notes; saves a backup copy of notes the user has selected and can be restored to put the notes back if they are lost.
You can create a backup in Just Type by long pressing the list view, selecting notes, clicking the action button, choosing Email Backup, and then tapping the "Email as Backup" button. A new email will be created with a JTBACKUP file as an attachment.
NOTE: Just Type is no longer available for download.
|Shubham Kedia Just Type|
Updated: March 19, 2016