iPhone app · English & Spanish AI voice coach

Speak English.
Habla español.

Meet Lumi, your AI voice coach. She listens, corrects, and talks back — in English or Spanish, from A2 to C1.

iPhone · 7-day free trial

Download on theApp Store See how it works

Available on the App Store · Cancel anytime in your Apple ID

Made for iOS 17+
No ads, no cross-app tracking
A2 → C1 in one app

+12 XP

14-day streak

A2 → C1

Good evening

Lumi

14dSTREAK

B1LEVEL

82%PRON.

Recommended · 2 min

Review 3 cards before moving on

HOME

PRAC.

VOICE

VOCAB

How it works

A daily loop that respects your time.

1
Open and see today
Streak, level, pronunciation score — one glance tells you where you stand.
2
Talk with Lumi
Real conversations, corrected phoneme by phoneme, at your CEFR level.
3
Come back tomorrow
Spaced repetition keeps yesterday's words alive without shaming you.

Two tracks, one app

Independent subscriptions. Hold both at once.

English and Spanish are fully separate tracks — own coach, own decks, own progress, A2 to C1. Learn one or hold both.

English

Our deepest track

Voice Coach with Lumi plus 6 distinct AI characters, Pronunciation Lab, Roleplays, Writing Coach and Word of the Day — all on top of the shared toolkit.

US$9.99/month · 7-day free trial

Spanish

Full shared toolkit

Voice Coach in Spanish with Lumi and the full shared toolkit: Guava Stories, Grammar Clinic, Listening Lab, Conjugation Sprint, Flashcards and Memory Palace. Grows every month.

US$9.99/month · 7-day free trial

The toolkit

Ten tools that work together.

Everything you need to speak, read, listen and write with confidence — in one app.

Featured tool

Voice Coach

Talk to Lumi in real time — she listens, corrects and answers back.

Pronunciation Lab

Phoneme-level feedback with a Focus Mode for your weakest sound.

Roleplays

Real scenarios by CEFR level: interviews, travel, meetings, everyday life.

Writing Coach

Surgical native-level correction, per-error explanations and a rewrite.

Guava Stories

14 interactive dialogues with plots, per-character voices and checkpoints.

Grammar Clinic

One clear rule, worked examples, a 6-question drill explained answer by answer.

Listening Lab

132 dictation sentences with word-by-word diff feedback.

Conjugation Sprint

Spanish tenses with accent-tolerant checking; English irregular verbs.

Flashcards

SM-2 spaced repetition with per-language decks.

Memory Palace

Every real mistake you make, captured and scheduled for spaced review.

The habit

Practice that actually sticks.

Small daily wins, gently reinforced. Nothing here shames you into practice — it just makes coming back easy.

Streaks with Streak Freeze protection
XP and daily goals
Fluency Score
Phoneme mastery heatmap
Optional 7:30pm daily reminder
Haptic feedback on every answer

interactive stories

grammar lessons

132

dictation sentences

AI conversation characters

A2–C1

CEFR levels

interface languages

Questions

Quick answers.

A premium iOS app that teaches English and Spanish with an AI voice coach named Lumi. Speak, listen, read and write — with instant, native-level feedback.

English and Spanish. Each is an independent track from CEFR A2 to C1, with its own coach, decks and progress.

US$9.99 per month, per language, billed through your Apple ID. A 7-day free trial is included when you start a subscription.

See all questions →

Ready when you are.

Download GuavaSpeak on iPhone. Seven days on the house — then US$9.99/month per language.

Download on theApp Store

Speak English.Habla español.