Pick your language, your target, and your daily pace — get the date you'll arrive, plus the review workload curve every other planner ignores.
Not sure of your level? Take the free vocabulary size test first.
Simulated with FSRS at 90% retention, assuming reviews graded "Good". The load climbs while old words come back for review on top of new ones, then eases after you stop adding words. Daily study time assumes ~8 seconds per review and ~25 seconds per new word — typical spaced-repetition averages.
Curious about the algorithm behind the curve? Try the interactive forgetting-curve simulator, or read the science of spaced repetition.
For vocabulary, the math is surprisingly concrete: reaching B1 requires roughly 2,500 words, and B2 about 4,000. At 15 new words per day, going from zero to B1 takes about 5–6 months of consistent study. Grammar and speaking practice run in parallel, but vocabulary is the most predictable — and most plannable — part of the journey.
10–15 new words per day is sustainable for most learners; 20–30 works during intensive periods but the review load compounds. The planner shows the hidden cost: every new word generates future reviews, so your daily workload keeps growing for months before it stabilizes. If the estimated daily minutes look too high, lower the pace — consistency beats intensity.
Spaced repetition schedules each word at expanding intervals — roughly 4, 15, 49, 146 days after learning it with FSRS at 90% retention. Early on you only review recent words; months in, reviews of old words stack on top of new ones. The curve in this planner simulates that accumulation so the plan you commit to is the plan you can actually sustain.
Free CEFR-leveled decks in 12 languages, scheduled by FSRS so you never over- or under-review.
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