Your location isn't updating correctly? Maybe your friends only see your real-time location when you have the app open?
If so, there's a good chance that battery-saving settings are enabled on your device. These settings can prevent Zenly from running correctly in the background. Therefore, your friends will only see your real-time location when you have the app open.
Please troubleshoot the following steps to ensure that battery-saving settings are disabled:
Android 6
Advanced settings > Battery manager > Protected apps > Zenly: ON
Apps > Zenly > Battery > Keep running after screen off: ON
Android 7
Battery > Close apps after screen lock > Zenly: OFF
You can also access it via Phone Manager App > Lock screen cleanup > Zenly: OFF
Battery > Optimize > XX apps are running when the screen is off, close to save battery power > Zenly > Close after screen locked: OFF
Apps > Zenly > Battery > Close after screen locked: OFF
Mobile data > Data saver > Zenly: ON
Android 8, Android 9, Android 10
Settings > Battery > App launch > Disable "Manage automatically" for Zenly
If the above steps do not resolve your issue, please consult the article, "My location isn't updating – Android" for further help.