3.18:
-Reduced memory & storage use
-bug fixes
3.17:
-bug fixes
3.16:
-track permission changes
-archive apps
-WebDAV self-signed certs
Other recent changes:
-OneDrive, Dropbox, SFTP, S3 & WebDAV support for backups
-Privacy details
-Task Manager (Shizuku)
-App Insights
-Watchlist & full store search