Deep In vs Duolingo
Looking for a Duolingo alternative? Deep In is not another course
These are not two versions of the same product, so a line-by-line winner is the wrong question. Duolingo is a course: exercises, levels, a streak, from zero. Deep In is not a course at all — it is immersion in real speech, with someone beside you explaining what was said and why. Most people need the first before the second.
What Deep In is. An app for learning English and Spanish from real video. You watch a YouTube video — a podcast, a vlog, an interview, a show — with the transcript under it in the video’s language and in your own language, word by word. Hold a word to see its meaning, or ask Solomia — an AI who can see what you are watching — what a phrase means, why a native said it that way and how it sounds in another accent. It runs on iPhone and Android, with the interface in eight languages.
Two different kinds of thing
| Duolingo | Deep In | |
|---|---|---|
| What kind of thing it is | A course — a planned sequence of exercises | An immersion simulator — real video, explained as you watch |
| Who chooses the material | Duolingo, in a fixed order | A curated library, plus any YouTube video you choose on Basic and Deep |
| Where it starts | Absolute beginner | You should already read a simple sentence |
| What it is built to do | Build vocabulary and grammar, and a daily habit | Close the gap between studied English and spoken English |
| Slang, contractions, accents | Not the subject — a course teaches the standard form | The whole subject: gonna, wanna, whatcha doin, swallowed sounds |
| Price | Free with ads; paid tiers remove them and add features | $7 a month Lite, $14 Basic, $21 Deep; $60, $95 or $135 a year |
| Trying it | Free, with limits, for as long as you like | First library video free for 24 hours after sign-up; no card |
Duolingo is described from its own public product; we do not quote a price, because Duolingo's paid tiers vary by country and promotion.
When Duolingo is the better buy
- You are starting from zero, or near it. A course is the right shape for the first months, and Deep In assumes you can already read a simple sentence.
- You want free. Duolingo has a real free tier; we do not — just one library video, free for 24 hours.
- You want a system for showing up. Levels, a daily goal and a streak are that system, and we deliberately have none of it.
When Deep In is
- You finished the course — at school, at university, in an app — and two natives at normal speed still go past you. That gap is the reason Deep In exists, and it is not the gap a course is built to close.
- You need the English of a particular life rather than of a syllabus: an interview, a doctor's appointment, a landlord, a parents' evening.
- You want to ask why. Solomia explains what a native said and why they chose that way to say it, in your own language, in the middle of the video.
This is not a swap. Nobody should abandon a course halfway to come here, and we are not trying to be a better version of one. Deep In answers a different question: why, after all those exercises, real speech still moves too fast.
Questions people ask
Should I stop using Duolingo and switch?
If you are still building basic vocabulary and grammar, no — finish what you are doing. Deep In starts being useful at the point where you read English comfortably but spoken English is too fast, which is usually after a course rather than instead of one.
Is Deep In a course?
No. There is no syllabus, no levels, no daily goal and no streak. You watch what you would have watched anyway, and the explanations arrive where you get stuck.
Is there a free version of Deep In?
No. On a phone new to Deep In, your first library video is free for 24 hours after sign-up, with no card, and everything works with it. A second video, or anything after those 24 hours, needs a subscription.
Try it before deciding
Open a library video, look up the words you miss, talk to Solomia, and see whether the gap you have is the one we close.