Dictoterix is the first online learning service built end-to-end around the bilingual-dichotic method: your native language in one ear, the language you're learning in the other, at the same moment.
Most apps teach “words”. The question that matters is which words — so every level in Dictoterix is measured against a reference inventory of what an A1–C1 learner actually needs.
No card. No trial clock. It's just free.