I'm not getting study reminders on my phone

The app asks to send notifications only after you finish your first study session, and it sends one reminder a day, only on days you have cards due. No cards due, no reminder. That's expected.

If you do have cards due and nothing arrives, check the switches below.

iPhone

• Settings → Notifications → CSTSetup → Allow Notifications on.
• Check that a Focus (the moon icon in Control Center) isn't silencing apps.
• Settings → Notifications → Scheduled Summary: make sure CSTSetup isn't being held for the summary.

Android

• Settings → Apps → CSTSetup → Notifications → on.
• Settings → Apps → CSTSetup → Battery → set to Unrestricted. Some phones, Samsung and Xiaomi especially, stop background apps from delivering.
• Check Do Not Disturb isn't on.

Reminders come from the app

The website doesn't send reminders. If you've never installed the app, there's nothing to turn on; install it and finish one study session, and it will ask.