By following these steps you can check and enable notifications for an iPhone.
1. Open TimesUpp.
2. Click on Settings at the top of the TimesUpp app next to "Where do you want to go?" in the tab Home and/or Map
3. Click on Privacy to open the settings of your device.
4. Make sure that your settings are the same like the screenshot below.
5. Click on Notifications and make sure that your settings are the like the screenshot below.