No — that's the point. Water Reminder stops nudging you once today's goal is met, and starts again tomorrow.
Check that notifications are allowed: iOS Settings → Notifications → Water Reminder → Allow Notifications. Then open the app once so it can reschedule. If the app hasn't been opened for a couple of days, reminders pause until the next open.
Not in this version. All data lives on your device only — see the privacy policy.
Found a bug or have a suggestion? Open an issue on GitHub.