The Orgzly+Syncthing is an awesome combination. Also, as alternative it is worth mentioning the Standard Notes [0], which tends to be have-it-all-as-extension [1][2] note editor - however, it lacks the org-mode.

[0]: https://standardnotes.org/

[1]: https://standardnotes.org/extensions#editors

[2]: https://standardnotes.org/demo