To turn off Promptle or daily challenge reminders in the app, use the same steps for each:

Daily challenge reminders

1. Open your challenges list (My Games / challenges modal).
2. On a daily challenge reminder, click Hide reminder.
3. Then click Hide daily challenge reminders to hide all daily challenge reminders.

Promptle reminders

1. Open your challenges list (My Games / challenges modal).
2. On a Promptle reminder, click Hide reminder.
3. Then click Hide Promptle reminders to hide all Promptle reminders.

To turn reminders back on later, open the challenges list and click Remind me about these.

Note: This only hides in-app reminders. To stop email notifications, update your notification preferences in Account settings.