Sorry to hear. Have you tried a reboot, or a clean install (after making a backup)?
Google console tells me that less than 1 in 1000 game sessions are terminated because of Out of Memory errors, and the game has less and less such issues with each new version. Maybe the game is not compatible with your device. Some low-spec devices with 1Gb RAM actually use up part of the RAM for video memory or other uses; this typically happens to Samsung cheaper phones, but also to other brands. If this is the case, I am afraid there's little I can do...
No, I hadn't tried a clean install but have done reboots. The game has actually been very stable since I picked it up, which is what stumped me with suddenly crashing a few moments after entering any city or town.
After some intensive trial and error, I did manage to alleviate the crashing. It would appear using the "simple fonts" settings option was the culprit as the game no longer crashes without that option used. I couldn't find any posts about that option possibly causing issues, though.