I've been thinking ...
One problem with dating apps is that people may find themselves in a vulnerable place with a stranger.
A simple enhancement would be to:
1. Add an in-app option for users an to send meet up arrangements (ie, location and other app recipient) to a secure location on the app provider's servers. In doing so, the user consents to this information being made available to authorities either at users request (see next point, SOS button) or at the request of authorities to app provider.
2. Add an SOS button which, if activated, automatically sends an alert advising meet up details to national police emergency number.
4. Following conclusion of the meet up, the user simply deletes the meet up details from the server.