The "reminder" tool is, as its name suggests, a reminder that you can set in order to receive a notification at the time you want to remind you to meditate. This feature is only available in the app.
To activate or deactivate the reminder in the app:
> Go to the "Programs" tab
> In the "Tools" category click on the "Reminder" icon
> You can activate or deactivate it by clicking on the "Remind me to meditate" button
> You can set up the reminder by changing the time, clicking on the little pencil 🖍 . You can also choose the recurrence of the reminder by selecting the days you want to receive it.