Now in private beta · 2026

Speak English.
Senal builds your map.

Every word you use — and every word you stumble on — is captured, scheduled for exactly the right moment, and woven into a living knowledge graph of your vocabulary.

Voice-first · spaced repetition · personal knowledge graph
live · session #14 Lexi listening
Lexi — your AI tutor
targeting B2 · 14 focus words active
lexi
Tell me — how was your ephemeral moment of peace this week? Did anything feel fleeting?
I think the morning chai… but I always seems to hurry it.⚠ hurry
lexi
I love that image! Quick note — "hurry" is /ˈhʌri/, not /ˈhʊri/. The vowel is like "fun". Now, do you find those ephemeral moments more valuable because they don't last?
◈ today's focus words ephemeral ✓ fleeting ✓ transient impermanent
◈ your word graph · 47 nodes ephemeral fleeting transient brief moment
Team that has worked & researched at
Scaler IIIT Delhi Nagasaki University
800ms AI response start time
3 Systems working in parallel
A1–C2 CEFR-aware scheduling
Graph grows every session

Three systems.
One conversation.

Senal converses, schedules, and maps — simultaneously. You just speak.

01

You speak. Lexi listens — and corrects.

Senal runs a live voice conversation with Lexi, your AI English tutor. Lexi knows your current CEFR level, remembers words you've struggled with before, and weaves them naturally into every chat.

  • Pronunciation errors caught in real time — corrected gently, never awkwardly
  • Conversation adapts to your level: A1 through C2
  • Lexi guides you toward your scheduled focus words without breaking the flow
  • Supports Hindi-to-English code-switching detection
senal.ai/session/live
lexi What did you find most perplexing about your week? Something that left you puzzled?
you My colleague's decision was very… peculiar. Yes, I was perplex by it.
lexi Great use of "peculiar"! One small thing — "perplex" is an adjective when you say "perplexed" — "I was perplexed by it." The -ed ending matters. But tell me more — what did they decide?
◈ pronunciation & grammar log
"perplex" → perplexed · past participle · flagged for SRS
02

Every word gets scheduled — precisely.

After each session, Senal's extraction engine analyses your full transcript, identifies every new word and error, and schedules each one against the SM-2 spaced repetition algorithm — surfacing it at the exact moment you're about to forget it.

  • SM-2 algorithm with conversational quality scoring (not flashcard clicks)
  • IPA pronunciation fetched and stored for every vocabulary item
  • CEFR level (A1–C2) assigned from the Oxford 5000 word list
  • Calendar heatmap shows your upcoming review load at a glance
senal.ai/srs/schedule
perplexed /pəˈplɛkst/
B2 due today
ephemeral /ɪˈfɛm.ər.əl/
C1 due today
peculiar /pɪˈkjuː.li.ər/
B2 in 6 days
transient /ˈtræn.zi.ənt/
C1 in 14 days
◈ review forecast · next 14 days
03

Your vocabulary becomes a living map.

Every session enriches your personal knowledge graph. Words are nodes; synonyms, antonyms, co-occurrences, and phrases are edges. Watch your graph grow — a visual record of everything you know and how it connects.

  • 3D interactive graph — click any word to explore its neighborhood
  • Node colour encodes mastery: amber (new) → blue (learning) → green (mastered)
  • Synonym and antonym edges fetched automatically after each session
  • Filter by CEFR level, mastery score, or relationship type
senal.ai/graph
vivid linger fleeting transient peculiar perplexed ephemeral C1 · focus
47 Words
83 Edges
12 Mastered

Built for real learning, not engagement metrics.

🎙
Free-form voice conversations
No scripts, no drill menus. Just talk — about your day, your work, anything. Lexi meets you where you are and adapts in real time.
Pronunciation error detection
Lexi flags mispronunciations as they happen — categorised by error type (stress, vowel, consonant) — with a short memorable tip to fix it.
📅
SM-2 spaced repetition
Each word gets an individual review schedule based on how well you used it in conversation — not a generic flashcard click. The algorithm adjusts with every session.
🕸
3D knowledge graph
A living, interactive map of your vocabulary — with synonym, antonym, and co-occurrence edges built from your own conversation history. No two users' graphs look the same.
🎯
CEFR-aware targeting
Set your target level (A1 through C2). Every word is tagged against the Oxford 5000 frequency list. Senal keeps your vocabulary growth ahead of your current level.
📊
Session analytics
After every session you get: new words learned, errors corrected, focus words tested, and your streak. The calendar heatmap shows every day you've spoken.

Students are already thinking in English.

"

After two weeks, my manager at Accenture told me my written English suddenly felt more "natural". I realised it was because I was actually using the words I'd practised — not just memorising them.

A
Arjun Mehta
Senior Analyst · Accenture India
"

The graph is addictive. Watching "ephemeral" connect to "transient" and "fleeting" and then to "impermanent" — I understood relationships between words I never noticed before.

P
Priya Nambiar
Product Manager · Zocketpay
"

I've used Duolingo, Babbel, every app. Senal is the first one that makes me genuinely think in English during the conversation, not just translate from Hindi in my head.

R
Rohit Sinha
Founder · Instamojo
"

As someone preparing for an overseas PhD application, the C1/C2 vocabulary scheduling was exactly what I needed. My IELTS writing score went from 6.5 to 7.5 in six weeks.

N
Neha Agarwal
Research Scholar · IIIT Delhi
"

After two weeks, my manager at Accenture told me my written English suddenly felt more "natural". I realised it was because I was actually using the words I'd practised — not just memorising them.

A
Arjun Mehta
Senior Analyst · Accenture India
"

The graph is addictive. Watching "ephemeral" connect to "transient" and "fleeting" and then to "impermanent" — I understood relationships between words I never noticed before.

P
Priya Nambiar
Product Manager · Zocketpay
"

I've used Duolingo, Babbel, every app. Senal is the first one that makes me genuinely think in English during the conversation, not just translate from Hindi in my head.

R
Rohit Sinha
Founder · Instamojo
"

As someone preparing for an overseas PhD application, the C1/C2 vocabulary scheduling was exactly what I needed. My IELTS writing score went from 6.5 to 7.5 in six weeks.

N
Neha Agarwal
Research Scholar · IIIT Delhi

Your vocabulary is already a graph.
Isn't it time you saw it?

One conversation a day. Senal handles the rest — scheduling, mapping, correcting.

◈ Voice-first · Safe by design · Human-in-the-loop