Back up your plans
Your plans are saved only in this browser. Clearing browser data would erase them.
Google Calendar reminder
Adds a repeating event on your reading days. It doesn't follow pauses or schedule changes, so edit or delete it in Google Calendar when your plan changes.
Email and WhatsApp reminders
These need a server, so they aren't available in this version.
Backup
Your plans are saved only in this browser on this device. Clearing browser data or switching devices would lose them, so save a backup file now and then.