Apologies for the issue! You can follow these instructions and that should take of it.
Go to Hallow app in your phone settings and check the following:
Click on Data Usage and make sure “Allow background data usage” is toggled on.
Click on Battery and make sure “Allow background activity” is toggled on (this could also be called “Put app to sleep” in some older versions of Android
If you have a Samsung phone, look under the Optimize Battery Usage section, make sure Hallow is not checked, that should do it!
If you are still having issues, please ping us in this chat or send an e-mail to support@hallow.app