There's some on-going discussion of location security on the Tapatalk user forums:https://support.tapatalk.com/threads/can-posting-using-tapatalk-reveal-my-location.22103/
The view there is that the Tapatalk app doesnt have permissions set to read location info on android devices. I can confirm that the app doesnt have permission to read location on my phone. Other browsers must ask before passing this info on too.
The tapatalk privacy statement says the app can share your IP address with the Tapatalk company and that they promise to anonymise this and use it only for statistical purposes. If this worries you the user should use a proxy service like Tor and avoid the app on unrooted android phones.