One word a day — in all its forms.
Most apps teach a word as a string. OneWord teaches the whole paradigm — the day's word in every form it actually takes, met across real sentences rather than one example.
For example
pes — dog
pes · psa · psovi · psa · pse · psovi · psem
Seven Czech cases, singular. Then seven more in the plural. That table is the lesson.
Pick one
Eight categories so far: three modes, three content types, two games. Word, Wordfind and Race are live; the rest are defined, not built.
Where this is
The foundation is built: content schema, translations, logging, alerting and the installable app shell. The daily word itself is next.