Mnemosyne APP
IMPORTANT: this is not stand-alone software, but requires the desktop client from mnemosyne-proj.org to create cards. Instructions on how to set up the sync server can be found here: http://mnemosyne-proj.org/help/syncing
For more details on Android specific issues, see here: http://mnemosyne-proj.org/help/android-client
PLEASE DO NOT USE THE REVIEWS FOR SUPPORT REQUESTS, but use https://groups.google.com/forum/#!forum/mnemosyne-proj-users, as we read that more often than the review comments on Google play.
SAMSUNG S9 USERS, if you don't see the menu, turn ofF full screen support for Mnemosyne (see step 7 here https://videotron.tmtx.ca/en/topic/samsung_galaxys9/using_full_screen_mode.html)