Learning tools
Interactive tools for adult learners of Spanish, French, and Mandarin. Vocabulary drills, time-to-fluency estimators, and language similarity calculators. All free, all in the browser, no account required.
Flashcards (spaced repetition)
Drill vocabulary with a spaced-repetition engine in your browser. Decks for Spanish, French, and Mandarin. Progress stored locally.
Vocabulary quiz
Multiple-choice vocabulary quiz across the three launch languages. Random words from the core 2,000 frequency list.
Mandarin tone trainer
Drill the four Mandarin tones in pairs. Identify the tone you hear and learn the pairs that get most confused.
FSI time-to-fluency estimator
Input your weekly hours and target CEFR level. Get an honest estimate of how long it will take, based on FSI category data.