Practice
Three ways to actually retain it.
Recognition, reading speed, and long-term memory are separate skills. Each drill trains one, and each is built to resist the shortcut that makes other apps feel like progress without being it.
Receptive drill
Read a sign and pick its meaning from minimal-pair distractors. No guessing, no lip-reading.
Un-gameable by design
Fingerspelling
Read words spelled at conversational speed. The sub-skill everyone skips and everyone needs.
Speed ramps 1.2 to 5 letters/sec
Flashcards
FSRS spaced repetition resurfaces the signs you keep missing, right before you'd forget.
Recognition memory
Your progress
Stored on this device only. Nothing is sent anywhere.Nothing recorded yet. Finish a lesson, run a drill, or read a few fingerspelled words and this section will start pointing you at what to work on.