You can set in the app (in the browser or on the smartphone) in which intervals the position should be updated.
Will the position be sent at the specified interval? – Not necessarily.
To send the position, GRETA needs a working network connection. Depending on the circumstances, GRETA may be able to record a new position but not send it because the tracker is currently unable to establish a network connection, e.g. because of a radio hole.
Positions that can not be sent within the set interval are cached and sent the next time the network connection is successful.