Saw the question re retention of data by Grindr/Tinder and did some digging (Incognito is your friend!) and have found these answers:
Grindr:
Yes, messages are retained by the company as proved by statements
*"Instant Message. When you send an instant message (which may include photos, location, audio or video) to other users of the Grindr Service,
we will retain the messages (Instant Messages) as required by the operation of the Grindr Service."
*"Disclosure Of Your Personal Data. We disclose Personal Data and Anonymous Data, as described below (and elsewhere in this Privacy Policy)."
*"Other Disclosures. Regardless of any choices you make regarding your Personal Data (as described below), Grindr may disclose Personal Data in response to subpoenas, warrants, or court orders, or in connection with any legal process, or to comply with relevant laws; to establish or exercise our rights to defend against legal claims; if we believe it is necessary to investigate, prevent, or take action regarding illegal activities, suspected fraud, safety of person or property, violation of our policies, or as otherwise required by law."
So essentially the data will be on Grindr's servers and will be disseminated when legally required.
Tinder:
By using the service you are supplying them with the content of your messages
*If you chat with other Tinder users, you provide us the content of your chats, and if you contact us with a customer service or other inquiry, you provide us with the content of that communication.
* In response to a subpoena or similar investigative demand, a court order, or a request for cooperation from a law enforcement or other government agency Tinder will disclose information upon request from law enforcement
At this point I now know more than I wanted to about the above apps (not to mention finding out there are a few more of similar ilk!)
:blushing: