Google released Trusted Contacts for Android at the end of last year as an app version of Facebook’s Safety Check that automatically shares your phone’s status to close friends and family.
Trusted Contacts can reactively share your location, even if your phone is out of battery, when linked friends ping your account using the service. Alternatively, you can use it to proactively ping certain people and give a short status — say, if you’re walking home late at night — and then turn it off when you get home safe.
Google’s also added a few things to the Android version. The app now lets you toggle how long it’ll wait before sending your location to contacts should you lose signal. If you go hiking in the mountains, you can toggle how long the app waits before automatically sharing your location — assuming, say, you got lost and can’t get signal.