Poppins is described as 'Rsync based backup script with incremental snapshots' and is an app in the backup & sync category. There are three alternatives to Poppins for a variety of platforms, including Linux, Linux Mobile, Flathub, GNOME and Mac apps. The best Poppins alternative is Déjà Dup, which is both free and Open Source. Other great apps like Poppins are rdiff-backup and Duplicity.
Déjà Dup is a simple backup tool. It hides the complexity of doing backups the Right Way (encrypted, off-site, and regularly) and uses Restic behind the scenes.
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rdiff-backup backs up one directory to another, possibly over a network. The target directory ends up a copy of the source directory, but extra reverse diffs are stored in a special subdirectory of that target directory, so you can still recover files lost some time ago.
Duplicity is a software suite that provides encrypted, digitally signed, versioned, remote backup of files requiring little of the remote server.
