If you find yourself with lost data from the HiFolder By Elite Tracy app after upgrading to iOS 11, please contact our support team using the contact information below. So long as it is present in your backup, we will be able to assist you in recovering this data with iPhone Backup Extractor.
Users will see the application presents under App View similarly to the screenshot below. The app stores its main data file under fmanager.

iPhone Backup Extractor extracting data from HiFolder