QOwnNotes is a multi-platform notepad and to-do list manager that leaves users in control of where and how their data is stored. Notes are stored in a designated folder as a set of markdown files. While QOwnNotes includes an integrated editor, users may also modify their files by using their text editor of choice. When this happens, QOwnNotes will detect that a file has been changed and simply reload it. Optionally, it can highlight what has changed when this happens. Users can keep multiple instances of QOwnNotes synchronized using their preferred synchronization tool - the QOwnNotes documentation mentions ownCloud, NextCloud, Dropbox, Syncthing, Seafile, and BitTorrent Sync as popular options. Users may also opt to use the MyOwnNotes Android app or the CloudNotes iOS app to access their notes on a mobile device. QOwnNotes itself is available for Windows, macOS, and Linux.