You can now track your smartphones, GPS devices and digital radios from a unified system on the cloud. The 10-20 Group app allows you to monitor your groups location (whatever their devices are) from an IOS device. The 10-20 Group app also allows you to track the device history on a given day, just select on the date you wish to view and it will show the device location history. Make sure to also check out the 10-20 Tracker companion app.