The Multi Remote Camera app for Android devices, takes photos and videos when triggered remotely over a local WIFI network using broadcast messages. You can capture photos and videos nearly simultaneously on local network connected devices running this camera app. Depending on the type of local private network, the number of triggered devices can range from 1 to 253 or 4093 maximum.
To use the app for remote trigger you must enable WIFI Remote Control in Settings.
For security reasons...