Troubleshooting Notifications
iOS
Confirm that you have enabled notification permissions for Period Tracker and Calendar.
iPhone Settings > Period Tracker and Calendar > Notifications > Allow Notifications.
Enable Sounds, Badge App Icon, and Show on Lock Screen.
iOS 10: Enable Show in Notification Center and select the alert style of Banners.
iOS 11+: Enable Show in History and Show as Banners.
Disable Low Power Mode: iPhone Settings > Battery > Disable Low Power Mode
Confirm that the date and time settings for your phone are set correctly for your time zone. Compare to the time set by time.gov or by time.is.
Android
Confirm that your phone is connected to the internet.
Your phone is not in airplane mode. Android phone Settings > Network & Internet > toggle to turn Airplane mode on and off.
You have enabled cellular data or Wi-Fi.
Update to the latest version of Period Tracker and Calendar Android.
Update the Google Play services app on your phone.
You have enabled cellular data or Wi-Fi.
Confirm that the date and time settings for your phone are set correctly for your time zone. Compare to the time set by time.gov or by time.is.
Check if the notification appears in your Android notification bar or tray.
Confirm you have enabled WiFi or cellular data while your phone is asleep. Android phone Settings > Wi-Fi > Advanced > Always keep Wi-Fi on during sleep.
Android 4
Disable WiFi optimization. Android phone Settings > Wi-Fi > Menu > Advanced > uncheck Wi-Fi optimization.
Enable background data. Android phone Settings > Data usage > Menu/More > Auto-sync data > OK to enable auto-sync data.
Android 5
Android phone Settings > Data usage > Cellular data usage > Period Tracker and Calendar > Background data > Enable Unrestricted data usage.
Android phone Settings > Data usage > Menu > Make sure Period Tracker and Calendar is allowed to work if you've selected 'Restrict app background data'.
Android 6
Make sure all of Period Tracker and Calendar's permissions are granted: Android Settings app > Apps & Notifications (depending on your device, this may look different) > Period Tracker and Calendar > App Permissions (depending on your device, this may look different) > Turn permissions on.
Check that Period Tracker and Calendar is excluded from battery optimization:
Advanced settings toolbar icon > Battery optimization > select 'All apps' > Period Tracker and Calendar > select 'Don't optimize.’ > Done > Restart your phone.
Android phone Settings > Apps > Advanced settings toolbar icon > Special access > Battery optimization > select 'All apps' > Period Tracker and Calendar > select 'Don't optimize.’
Android phone Settings > Battery > MENU > Battery optimization > select 'All apps' > Period Tracker and Calendar > select 'Don't optimize.’
Android phone Settings > Apps > Advanced settings toolbar icon > Ignore optimizations > select 'All apps' > Period Tracker and Calendar > select 'Allow.’
Android 7
Follow steps for Android 6 above.
Enable background data: Android phone Settings > Data usage > Data saver > If data saver is disabled, stop here. If data saver is enabled go to Unrestricted data access > Enable Period Tracker and Calendar.
Android 8 and above
Follow steps for Android 6 above.
Enable Period Tracker and Calendar to run in the background. Android phone Settings > Apps > App Info > tap our app > Battery > turn on the 'Background activity' option. Android phone Settings > Data usage > Data saver > If data saver is disabled, stop here. If data saver is enabled go to Unrestricted data access > Enable Period Tracker and Calendar.
Asus and ZenFone
Android phone Settings > Power management > Auto-start manager > DOWNLOADED page > select 'Allow' for Period Tracker and Calendar.
HTC
Boost+ app > Optimize background apps > Period Tracker and Calendar > select 'Off.'
Huawei
Android phone Settings > Apps > Period Tracker and Calendar > Power Usage Details > App Launch > Set to Manage Manually and enable these options: Auto-Launch, Secondary Launch, and Run in Background.
Phone Manager app > Battery manager (or Energy Saver) > Protected apps > Enable Period Tracker and Calendar.
Android phone Settings > Advanced Settings > Battery manager (or Energy Saver) > Protected apps > Enable Period Tracker and Calendar.
Android phone Settings > 'All' tab > Protected apps > Enable Period Tracker and Calendar.
Phone Manager App > Protected apps > Enable Period Tracker and Calendar.
Android phone Settings > Apps > Advanced/Special Access > Ignore battery optimizations > All Apps (drop down) > Enable Period Tracker and Calendar.
Android phone settings > Battery > Launch > Period Tracker and Calendar.
Android phone settings > Apps > Period Tracker and Calendar > Data usage > Background Data > Enable.
Android phone Settings > Notification panel & status bar > Notification center, find Period Tracker and Calendar and activate Allow Notifications and Priority Display.
Lenovo
Android phone Settings > Power manager > Background app management > add Period Tracker and Calendar to the unrestricted list or allow Period Tracker and Calendar to auto-start.
Nokia
Android phone Settings > Battery > Background activity manager > ensure that the toggle is disabled for Period Tracker and Calendar.
OnePlus
Android phone Settings > Apps > Gear icon > Apps Auto-launch > Enable Period Tracker and Calendar start-up in the background.
Android phone Settings > Battery > Menu > Aggressive Doze & App Hibernation > Disable this mode or prevent Period Tracker and Calendar from being limited in this mode.
Android phone Settings > Apps > Menu > Auto Run > Disable this mode or prevent Period Tracker and Calendar from being limited in this mode.
Oppo
Apps > Security center > Privacy permissions > Auto-run management (or Startup manager) > Enable Period Tracker and Calendar.
Android phone Settings > Application management > Running tab > Enable Period Tracker and Calendar.
Samsung
Android phone Settings > Apps > Period Tracker and Calendar > Mobile data > Allow background data usage
Android phone Settings > Security > Auto-start management > Enable Period Tracker and Calendar.
Android phone Settings > Wi-Fi > Advanced > Always keep Wi-Fi on during sleep.
Android phone Settings > Device Maintenance > Battery > MENU > App Power Monitor > Disable or selectively choose apps to sleep from Settings > Device Maintenance > Battery. Make sure to exclude Period Tracker and Calendar from the sleep list.
Android phone Settings > Device Maintenance > Battery > Power saving mode > Disable ot adjust to MID.
Android phone Settings > Battery > Detail > Period Tracker and Calendar > Turn off.
Android phone Settings > Battery > Battery usage > MENU > Optimize battery usage > select 'All apps' > Disable Period Tracker and Calendar.
Android phone Settings > Battery > Battery usage > MENU > Optimize battery usage > select 'All apps' > Disable Period Tracker and Calendar.
Android phone Settings > Battery > Unmonitored apps > Add apps > Period Tracker and Calendar > Done > Restart your phone.
Samsung 8: Android phone Settings > Apps > Menu > Special Access > Optimize battery usage > select the drop down which likely states ‘apps not optimized’ and switch to ‘all apps’ > find Period Tracker and Calendar and tap on the switch to turn it off.
Sony
Android phone Settings > Storage & memory > turn off the 'Smart cleaner' option or continue to tap the three dots at the top right > Advanced > add Period Tracker and Calendar to the whitelist.
Android phone Settings > Power management > Tap STAMINA mode > Apps active in standby > add Period Tracker and Calendar to the whitelist.
Xiaomi / MIUI
Android phone Settings > Services > Security > Permissions > Autostart > Enable Period Tracker and Calendar.
Android phone Settings > Additional Settings > Battery and Performance > Manage apps' battery usage > turn 'Power saving modes' off > open the Security app > navigate to Permissions > add Period Tracker and Calendar to Autostart > invoke Task Manager > find Period Tracker and Calendar > drag it downwards until the padlock icon appears.
Android phone Security app > Settings > Data usage > Allow background data.
Unlisted phone/OS
If your phone or OS is not listed, you can search for specific settings on your phone in the following categories
Notifications
Priority mode
Battery power and optimization
Background permissions
Autostart