scheduled tasks - How to use Heroku-Scheduler -

i've installed https://addons.heroku.com/scheduler in heroku app, cannot make instruction work.

i think don't know correct syntax, i've tried heroku pgbackups:capture --expire --app running-app command , selected frequency 10 mins.

it's been more hour , still hasn't done anything.

how can work?

thanks

edit: command example command, nor want use 1

you should using pgbackups addon, https://addons.heroku.com/pgbackups scheduled based on level pick.

heroku scheduler more if need run rack task within application codebase.

update based on revised question:

you write rake task (assuming using rails?) run locally using rake taskname , schedule on heroku enter rake taskname command in scheduler page them execute it.