ALERTCOPS is an authorised app issued in Spain. It is free to download and use, and is available in English. It is an ideal app for pilgrims on the Camino de Santiago.
It permits you to send an instant report of crimes/incidents to the police, with photos and video if necessary, and your location.
Once downloaded, you should spend some time configuring it. It is a little unclear in places.
If you select to give it access to your GPS (recommended), it can send a report straight to the emergency services with your precise location. It can also send push notifications to your phone if there are threats in your vicinity.
Go to >More (bottom right)>Geolocalised Services> and choose the frequency of checks.
You can add up to 3 'guardians' who can receive a message and audio from you if you activate the SOS function. Instructions via the 'more' page, under SOS.
Once set up, there is a test button to see if it is functioning.