Voice-first vocabulary

Five words a day, fully yours.

Each day you learn five new words by speaking them out loud — say what each one means in your own words, use it in a sentence, and an AI voice coach corrects you on the spot — until the word doesn't just stick, it's yours.

Few but refined. Learned thoroughly.
Today 5 words
resilient  ·  nuance  ·  advocate  ·  deliberate  ·  thrive
0:06
Nice — "resilient" fits. Try stressing the second syllable: re·SIL·ient. One more sentence?
What is Fufive

It's better to own five words than to half-remember five hundred.

Fufive helps you build English vocabulary you can actually speak — out loud, one small batch at a time. You capture words anytime, anywhere: snap a photo, save one from the short daily article, or jot one down. But you only digest five a day, and you digest them by speaking — saying what each word means, building your own sentence, and getting instant feedback. Then spaced review brings each one back right before you'd forget it. Few but refined. Learned thoroughly. Fully absorbed.

Why Fufive

Built to make words yours.

Speak them until they're yours

You don't memorize a word, you produce it — explain what it means in your own words and use it in a real sentence out loud. That's the difference between recognizing a word and owning it.

An AI coach that corrects you on the spot

A voice coach gives instant feedback on pronunciation, grammar, and usage, and picks up a past session as one continuous conversation — so every word gets refined, not just logged.

The five that matter most, owned first

Frequency guidance (Zipf, CEFR-aware A1–C2) points you to the words you'll genuinely use, then spaced review brings each one back right before it fades — so what you take on, you keep.

Features

Everything points one way: depth.

LLM-powered voice coaching

  • Talk, don't tap — practice by voice from start to finish
  • Explain meanings in your own words, then make sentences out loud
  • Instant feedback: corrections, better phrasing, and real examples
  • Builds the confidence to actually speak

Spaced review that sticks

  • A personalized review schedule for every word
  • New and old words mixed automatically
  • Adapts to your mistakes and mastery level
  • Turns a few minutes a day into long-term memory

Frequency-guided word path

  • Prioritize the words you'll meet most in real English
  • Clear levels and progression (CEFR-aware A1–C2)
  • The few words that carry the most real conversations — owned first
  • Snap a photo or pull from a short daily article to capture more
How it works

Five words. Spoken. Kept.

1

Capture words

Snap a photo, save one from the short daily article, or jot one down — anytime, anywhere.

2

Pick five

Choose the five worth your day, or let Fufive recommend the ones that matter most.

3

Explain by voice

Say what each word means in your own words. Fufive checks your understanding instantly.

4

Use it in a sentence

Say it out loud. The AI coach corrects pronunciation, grammar, and usage on the spot.

5

Review at the right time

Each word returns right before you'd forget it — so you remember without cramming.

6

Watch them add up

See what you've learned, what's mastered, and what's next. Depth, repeated, becomes range.

Why five

Five isn't a small dose of a big number — it's the most you can truly absorb in a day and still speak with confidence tomorrow. Cram fifty and you're left with fifty you half-recognize and zero you can produce. Speak five out loud, get corrected, and review them right before they fade, and you're left with five you actually own.

Small enough to speak every one.
Deep enough to keep them.
The science

Built on how memory actually works.

Active recall (speaking)

Explaining a word and building your own sentence forces real retrieval — and saying it out loud is how a word turns into something you can actually produce, not just recognize.

Spaced repetition

Timing beats cramming. Each word comes back right before you'd forget it, so what you learn keeps compounding into something permanent instead of fading by next week.

Frequency guidance (Zipf)

Frequency points you to the words you'll genuinely use — so the five you take on each day are the five that earn their place, owned first rather than skimmed over.

FAQ

Good questions.

What is Fufive?
Fufive is a voice-first vocabulary app built on a simple conviction: it's better to fully own five words than to half-remember five hundred. You capture words anytime — snap a photo, save one from the short daily article, jot one down — but you digest just five a day, by speaking. You say what each word means, build your own sentence out loud, and an AI voice coach corrects your pronunciation, grammar, and usage on the spot.
Why five words a day?
Five is the most you can truly absorb in a day and still speak with confidence tomorrow. Cram fifty and you half-recognize fifty and can produce none. Speak five out loud, get corrected, and review them right before they fade, and you own all five. Small enough to speak every one, deep enough to keep them — and depth, repeated daily, quietly becomes range.
What is spaced repetition?
Spaced repetition schedules reviews over time so you revisit each word right before you'd forget it. It's one of the most effective ways to make a word permanent — so the five you learn today are still yours months from now, without cramming.
What does frequency guidance mean?
Frequency guidance (Zipf, CEFR-aware A1–C2) points you to the words you'll genuinely use, so the five you take on each day are the five that earn their place. It's a selection filter for the right few — not a push to cover more — so you own the words that carry the most real conversations, first.
Do I need to type?
Voice is the default — you learn by speaking. Typing is optional, there when you want it.
Is Fufive for beginners?
Yes. Start with common words and short phrases, and the difficulty adapts over time. Frequency guidance keeps you on words you'll actually use, from A1 to C2.
Does Fufive need internet?
Voice analysis and AI feedback need an internet connection. Your saved words sync across your devices with iCloud.

Start with five today.

Speak them, get corrected, keep them. Few but refined — fully yours.