Can Cosmos send a reminder every day or every week?

Yes, daily or weekly:

• "Every day at 8 remind me to drink water."
• "Every Monday at 9 remind me to send the weekly report."

Repeating reminders keep the same local time, even when daylight saving time changes.

When a repeating reminder arrives, it has a Stop repeating button. You can also cancel it from /reminders.

Only daily and weekly repeats are supported. For "every weekday" or "every month", set separate weekly reminders or set them one at a time.