Kai - Learn Spanish with AI

Get fluent faster without any pressure. Kai watches your screen and turns everything you do on your phone into speaking practice. Try it for FREE!

Kai is your AI Spanish tutor and conversation coach. He sees what's on your phone screen and turns it into real Spanish practice — like having a native Spanish-speaking friend right beside you every time you pick up your iPhone. Your phone becomes an immersive Spanish environment, as if you just moved to Madrid, Mexico City, or Buenos Aires.

You already spend hours on your phone. Now, turn that screen time into real Spanish lessons. Just turn Kai on, switch to any app, and you'll see Kai's overlay with live captions of his Spanish and an instant English translation.

Kai is bilingual and adjusts how much Spanish he uses based on your level. Beginners hear more English while they build confidence. Intermediate and advanced learners get near-full immersion in Spanish. Because Kai sees your screen, he asks questions about whatever you're already doing — so practice is contextual, visual, and actually sticks.

Scrolling Instagram? Kai asks about the post in Spanish. Reading an article? Discuss it out loud together. Playing a game, texting a friend, shopping, or watching a video — every tap becomes Spanish conversation practice. Learn Spanish the way you learned your first language: by living in it.

Learn Spanish From What You Love Kai works across any app — games, photos, shopping, social media, videos. Your screen is already full of content you enjoy. Kai turns all of it into Spanish speaking practice, making lessons fun, visual, and effective.

Learn Spanish From Your Real Life Ask Kai anything, anytime. Need to send a text to a Spanish-speaking coworker and feel stuck? Ask Kai. Traveling soon and want to rehearse travel phrases for the airport, hotel, or a restaurant in Mexico? Roleplay it with Kai before you go. See an object you want to describe? Open the camera with Kai on and practice out loud.

A Spanish Coach Who Knows You Kai remembers every conversation and tracks where you need work — grammar, vocabulary, word choice, and natural phrasing. He personalizes lessons to your level, goals, and interests. You can also adjust his personality, from warm and encouraging to brutally honest.

Real Spanish Conversation Practice Speak Spanish to Kai and he listens and responds naturally in real time, like a native tutor sitting next to you. Kai corrects your grammar on the fly, reshapes awkward phrasing, and teaches new vocabulary through real conversation — not flashcards, not rigid curriculums. Roleplay ordering tapas in Barcelona, negotiating at a market in Oaxaca, or introducing yourself at a dinner party. This is how fluency happens.

Focus Areas: Spanish conversation, Spanish grammar, Spanish vocabulary, word choice, natural phrasing, listening, roleplay, travel Spanish, Spanish for beginners, intermediate Spanish, immersion, everyday phrases, native tutor, AI Spanish coach, screen time practice.

Our mission is a world where anyone can become fluent in Spanish by making language learning immersive, fun, and effective. Research shows you acquire a language faster and retain more when you use it in your daily life. That's why Kai is designed to plug Spanish into the apps you already love, with a native-speaking coach by your side. We believe no one should give up on a dream — a job, a trip, a relationship — because of a language barrier.

Built by a YC founder who learned a second language through immersion.

Try Kai free with the annual plan at $79.99/year. Also available weekly at $2.99/week. Both plans include a free trial.

Subscriptions renew automatically unless you turn off auto-renewal in your iPhone settings at least 24 hours before the current period ends. After canceling, you can still use Kai until the end of your current payment period. If you forget to cancel your free trial, ask Apple for a refund.

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy policy: https://www.withk.ai/privacy

Help? contact@withk.ai