We find that the most efficient way of knowing about your loved ones is to use the 3rings app.
3rings is available for iphones, compatible with ipads and also Andriod smartphones and tablets(see note).
IOS - 7 and above. Go to Apple Appstore and search 3rings or 3rings Care, for iPad search 3rings but select the iphone only option.
Android version 4 (Ice Cream Sandwich) or above. Go to Google Play and search for 3rings or 3rings care.
Note:3rings may work on Android tablets but the display has not yet been optimised for Tablet formats.