Save a name and one clue before it slips, then practice so it sticks.
Type the name and one clue: a place, a job, a jacket. Later, search the clue and the name is there. Practice cards show the clue and ask you for the name.
Names stay on your phone unless you turn on the optional backup. There is no account. Saving names, search, practice, and CSV export are free. The one-time unlock adds notebook colors and backup.
Know Their Name is on the App Store for iPhone. It is not on Google Play yet.