Chinese,
fine tuned
to your brain.
TongTong assesses your Mandarin from your very first session, then builds a personalised path that pushes the edge of what your memory can actually hold. No vocabulary import. No grinding from zero. Start exactly where you left off.
Never again waste your time
choosing your vocabulary.
Our algorithm picks every card. Open TongTong and the next word is already waiting: the one you are closest to forgetting, or the one you are finally ready to meet. Every answer sharpens the next choice.
- 01Always just hard enough.Cards land where you still have to reach but rarely fail — the sweet spot where memory grows fastest. Never trivial, never crushing.
- 02Timed to the day you would forget.Every word keeps its own schedule, so a review arrives just before the memory slips — and not one session earlier.
- 03Nothing to set up.No lists to import, no level to guess at. One minute of tapping words you recognise, and you start where you already are.
Comprehensible input.
Slightly beyond your edge.
Stephen Krashen's “i+1” hypothesis: learners acquire language best when they understand conversations slightly beyond their current proficiency. TongTong picks stories that match your level today, close enough to follow, just hard enough to grow.
Synced transcripts, level-tagged episodes, native-speaker narration. New episodes added every week.
All relevant vocabulary.
Ranked by what matters.
Most apps stop at HSK 6. TongTong studies the full 40,000+ word corpus. Every word a fluent speaker meets in real life. Continuously refined with modern conversational analysis so you learn the most useful, most frequent words first, and never waste a session on archaic vocabulary.
Your ability,
refined with every answer.
Most apps reduce you to a streak. TongTong models your ability as one continuous estimate, fusing three established sciences into a single picture of how you learn, and where you'll grow next.
Spaced Repetition
Each word lives on its own forgetting curve. TongTong returns it the moment your memory is about to slip, not a day too early, not a day too late.
Psychometrics
The science behind standardized tests, adapted for Chinese. Every answer estimates your ability against the entire vocabulary, not just the words you have seen.
Probabilities
A probabilistic model continuously infers what you know. Confidence rises, uncertainty narrows, the next card is always the one that teaches us most about you.
Unlimited practice,
unlimited stories.
Free is a real session every day and a story every week. Plus takes the cap off — and keeps your streak alive when life gets in the way.
- Unlimited session items — free stops at 30 every 24 hours
- Unlimited stories — free unlocks one a week
- Streak recovery — frozen 48h away, recoverable 48h after
- 15% more XP — on every graded review
- Plus profile — ring on your avatar, badge on every board
- Classrooms & early access — classrooms when it ships
Cancel any time.
Your next review
is due.
Free to start. No ads, no notifications hunting your dopamine. The same algorithm that ranks 40,000+ words is yours from the first card.