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Out now

Meet it. Hear it. Feel it.
Finally understand real English — in Deep In.

An app on your phone: watch real videos from English native speakers — and break down every phrase with your AI friend as you watch.

Download on theApp StoreGET IT ONGoogle Play
Turn on a real video.Hear how real people speak.Tap a phrase — the AI breaks it down.
↗Want to see how much REAL English you actually know? Try our slang & idioms test — you'll be floored→

All of it — your fastest path to the real, living language.

What Deep In is

Deep In is an app for immersing yourself in the living language. You watch real native videos — podcasts, vlogs, shows — with an AI friend beside you who sees exactly what you see.

Tap any phrase and it explains right away: what it means, why a native said it that way, how it sounds in another accent. Slang, contractions, real pronunciation — the phrases no textbook will give you.

Not lessons about the language. The language itself — explained the moment you need it.

Three steps — and the language is yours.

An AI friend beside you at every step — the way a bilingual best friend would be.

1

Turn on a real video.

Podcasts, shows, vlogs, interviews — what natives actually watch.

2

Hear how real people speak.

Accents, speed, contractions, slang, "swallowed" sounds.

3

Tap a phrase — the AI breaks it down.

Meaning, context, pronunciation — not like a textbook, like a friend who knows both your worlds.

Everything school didn't teach you.

English as it lives — in films, between the lines of podcasts, in the accents of baristas, in the words you hear every day.

Living phrases

"Hit me up", "My bad", "No worries", "Got it" — the quick words that live in English every day.

Slang & casual speech

How friends actually talk — not how the business textbook says they should.

Accents & pronunciations

British, American, Scottish, Indian, Australian — all the voices you'll meet.

Contractions & connected speech

"Gonna", "wanna", "whatcha doin?", "lemme" — the sounds you never heard in class.

How Deep In compares

Honest lines about the category we play in — and the one we don't.

Category

Duolingo
Gamified school
Babbel
Online curriculum
FluentU / Lingopie
Subtitled video player
Deep In
Immersion + AI friend

Content source

Duolingo
Curated lessons
Babbel
Curated curriculum
FluentU / Lingopie
Licensed library
Deep In
Any video you love

AI role

Duolingo
Adaptive drills
Babbel
Limited
FluentU / Lingopie
Translation tool
Deep In
Friend explaining real life

Real native slang

Duolingo
Hardly
Babbel
Some
FluentU / Lingopie
Some
Deep In
Core focus

Multiple accents

Duolingo
One standard
Babbel
Few
FluentU / Lingopie
Variety
Deep In
Variety + context

Contractions, reduced speech

Duolingo
—
Babbel
Some
FluentU / Lingopie
—
Deep In
Core focus

Adaptive practice

Duolingo
Drills
Babbel
Spaced repetition
FluentU / Lingopie
Quizzes
Deep In
Conversation with AI

Best for

Duolingo
Casual hobbyists
Babbel
Structured learners
FluentU / Lingopie
Already-intermediate
Deep In
People who need it now

The questions people ask the most

Is Deep In the same as Deepin Linux?+
No — entirely separate products. Deep In (deepin.world) is an English-learning app built on real video. Deepin (deepin.org) is a Linux operating system from a different company. No affiliation; only the names are similar.
How is Deep In different from Duolingo?+
Duolingo is a gamified school with curated lessons. Deep In is immersion in real English through videos you already love. No levels, no streak rituals, no "sentence about a turtle eating an apple". You learn the language that actually sounds around you — and the AI beside you explains nuance the way a native speaker would, not the way a textbook would.
What does "living English" mean?+
The English you hear in life: podcasts, shows, vlogs, interviews, the café, the airport, work. With accents, slang, contractions ("gonna", "wanna", "whatcha doin?"), "swallowed" sounds. The stuff a textbook doesn't teach because it focuses on the "correct" literary version.
Do I need basic English to start?+
Yes — a base level is required. You should understand simple sentences. Deep In is best if you've already studied English at school or university but still can't follow native speakers freely. That's the gap we close.
Which videos can I learn from?+
Any — podcasts, vlogs, shows, interviews, documentaries, tech walkthroughs. The Deep In principle: learn through what interests you. Want stand-up — it's stand-up. Want cooking — it's cooking. The AI prepares the transcript and explains nuance at your level.
How does the AI work? Is it ChatGPT?+
The AI inside is not a generic chatbot. It sees which video you're watching, which words you've saved, which mistakes you've made. So it explains the way a bilingual friend would — why a native chose this phrasing in this context, what the alternatives are, how it sounds in other accents.
Is it out, and what does it cost?+
It's out — on the App Store and Google Play. The first day is open without an account, so you can watch, tap words and talk to Solomia before deciding anything. After that it's one subscription, with a free week for new subscribers. The price is shown in the app before you buy, in your own currency.
Out now

The living language is waiting.

Take the first step — it is on your phone in a minute.

Download on theApp StoreGET IT ONGoogle Play