Your students leave every session. You have no idea what Spanish they speak after.
Charla is an iPhone app students use to record real conversations — with you, with a classmate, or outside class. It catches every grammar mistake they make and gives you the full report before the next session.
Free for schools. Students pay €5.99 / month. GDPR-compliant. Both parties consent before every recording.
Join the Pilot Program →The market
500k+
expats in Barcelona alone actively learning Spanish
€2.3B
language school market in Spain — growing 12% a year
€200/mo
average student spends on classes — and still can't speak outside them
What you see
A mistake report for every student. Before every session.
Not a score. Not a badge. The exact sentences your student got wrong — and why.
Maria García
Conversation at Café del Born · 14 min · Feb 20
Said
"Yo soy cansado"
Should be
"Yo estoy cansado"
Use estar for temporary states, not ser
Said
"Fui al mercado ayer con ella"
Correct — no mistake
Said
"Me gusta los tacos"
Should be
"Me gustan los tacos"
Verb must agree with the subject (los tacos)
Vocabulary gaps
4 new words flagged
Top pattern
Ser vs estar confusion
Recordings this week
3 of 3 completed
Every student. Every conversation. Ready before you walk in.
Who it's for
Built for the people who actually teach.
Language schools
Right now
Your students do homework. They don't practice speaking. You have no way to know.
With Charla
Assign Charla recordings as part of the course. See exactly what each student struggles with before they walk into class.
Private tutors
Right now
You say "practice on your own" every session. They don't. Or they do, but you never know what went wrong.
With Charla
Assign two recordings per week. Review the mistake report in the first five minutes of your next session. Every lesson becomes targeted.
The hard questions
What a director will ask. Our answers.
Not just ChatGPT
Any student can paste a transcript into ChatGPT. Charla captures audio natively, transcribes verbatim (preserving every mistake instead of auto-correcting), tracks patterns across weeks, and gives you a structured view across your whole class — not a one-off chat.
The retention loop
Students see their mistake count drop week over week. They get a streak. Their top grammar patterns are surfaced back to them. Once a student sees their ser/estar mistakes fall from 8 to 2 in a month, they don't stop — that's the loop that keeps them recording.
The business model
Free for schools. Students pay €5.99/month directly. A 30-student class generates €180/month in recurring revenue — with zero marginal cost to you. Target: 50 schools × 40 students = €12k MRR by end of 2026.
How it works
Three steps. No new tools for you to manage.
Recommend it to your students
Students download Charla on iPhone. Takes two minutes. No setup on your end.
They record real conversations
In class with you, with a classmate, or outside. Both speakers know they're being recorded.
You get the report
Every mistake flagged. Every vocabulary gap noted. Ready before your next session.
On consent and privacy
Charla is designed for structured school settings — pair-work, role-plays, and assigned conversations where both speakers are aware. Students confirm both parties consent before every recording. Audio is processed and deleted — only the transcript and analysis are stored.
Seeking 3 pilot schools in Barcelona
Free for your school. Free for your students during the pilot. In return: 30 minutes of honest feedback on what teachers actually need.
Target: live in 3 schools by April 2026.
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