By chance, do you happen to know of any program that will add (and enable / start / etc) a systemd entry based on a valid crontab line? Extra bonus points if i

By chance, do you happen to know of any program that will add (and enable / start / etc) a systemd entry based on a valid crontab line? Extra bonus points if it yoinks things the other way and lets you edit them as a nice crontab file that makes sense before re-integrating it in to the nightmare syntax.