On Android: Go to device Settings → Apps → Zareva → Battery → set to "Unrestricted." Also check Settings → Apps → Zareva → Notifications and make sure notifications are enabled. Some manufacturers (Samsung, Xiaomi, Huawei) have aggressive battery optimization that can kill background apps — check your manufacturer's specific settings.
On iOS: Go to Settings → Notifications → Zareva and make sure Allow Notifications is on, with Banners, Sounds, and Badges enabled. Also check Settings → General → Background App Refresh and make sure Zareva is enabled.
If reminders still aren't working, please contact
support@zareva.app with your device model and OS version.