Comparison

Fela vs Deep In

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Fela

This app uses AI to simulate natural language learning through listening and speaking practice. Improve your comprehension and speaking skills by engaging in AI-powered conversations and consuming learning materials.

Highlights
  • AI conversation simulator
  • Speaking practice
  • Listening comprehension
  • Natural language learning
  • Engaging learning materials
Features
Read full description

Welcome to Fela! Revolutionize your language learning experience with our cutting-edge AI technology. Fela is an innovative platform that simulates the natural way languages are learned - by listening and speaking. Our AI-powered system mimics real conversations, allowing you to practice speaking and listening regularly. This approach enhances your speaking and comprehension skills, helping you learn new languages faster and more naturally. By listening to engaging learning materials and practicing speaking with our AI conversation simulator, you'll develop your speaking and comprehension skills and become a confident language speaker. Join the Fela community and experience the future of language learning. Start your journey today! Connect With Us Email: support@fela.co Website: https://fela.co Terms of Service: https://fela.co/terms Privacy Policy: https://fela.co/privacy

About

Deep In

Learn languages by immersing yourself in real-world content like YouTube videos. This app focuses on understanding native speakers and building practical vocabulary through interactive subtitles and personalized review tools.

Highlights
  • Watch real YouTube videos in original language
  • Interactive subtitles with word and phrase breakdown
  • Personalized vocabulary review with flashcards
  • Practice speaking with AI conversation partner
  • Vast catalog of diverse video content
  • Add your own YouTube videos
Features
Read full description

Here you don't learn a language — here you feel it. You watch real YouTube videos in English and take apart whatever you didn't catch, right where you are. The difference: not lessons, immersion. ONE LINE, ALL THE WAY DOWN Someone in the video says "she's so game." Every word is familiar. Game — a game? No: she's completely up for it. A dictionary hands you one meaning and stops there. Solomia keeps going: why "game" and not "ready", who you can say it to, and three more places it turns up. NOT THE USUAL WAY No dull lessons, no homework. No invented dialogues and no manufactured topics. No practice with a teacher who isn't a native speaker either. Everything here is the real thing from the start: you just watch video in the original, on the subjects you actually care about. You learn to understand native speakers — their imperfect, spoken, real language. And you fill your vocabulary with the words and phrases they actually use. AN ENORMOUS CATALOGUE From travel vlogs to talks on anything you like. History, hiking, AI. Podcasts, stand-up, interviews, TV shows. Or add any YouTube video to your own space yourself. You watch what interests you and learn the language at the same time. INTERACTIVE SUBTITLES Stop at any moment and take apart what you didn't get. Subtitles in two languages. Any moment can go deep with Solomia, and any word or phrase can be kept — together with the sentence it came from. A VOCABULARY YOU COME BACK TO Review what you kept as flashcards, or work it through with Solomia. She brings your own words back into conversation, in new examples, until they arrive without you reaching. SOLOMIA, OUT LOUD So that you don't only understand and know a lot, but can actually speak. Talk about the video you just watched the way you would with a friend. Or ask how to say something. No appointment, and nobody else in the room. COMPLETE FREEDOM You do and watch what you want, when you want, as much as you want. No compulsory rigid programme. Only your pace, your taste and your own responsibility. WHY IT WORKS It's like stepping into the language itself. Closer to how a child learns to understand, and then to speak, their first language. They just listen, and then try. Nobody teaches them grammar or rules. By their first lesson they already understand everything — and speak freely, sometimes far too much. Just try it. Dive and feel. Created by Ukrainians SUBSCRIPTION DETAILS Deep In offers an auto-renewable subscription, available monthly, every 6 months, or yearly. New subscribers get a 7-day free trial. Prices are shown in the app before purchase. The free trial converts to a paid subscription unless it is cancelled at least 24 hours before it ends. Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless it is cancelled at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours prior to the end of the current period. You can manage or cancel your subscription in your Apple Account settings after purchase. Terms of Use: https://deepin.world/terms Privacy Policy: https://deepin.world/privacy Support: https://deepin.world/support

Screenshots

Fela4 screens
Deep In4 screens

Verdict

The call

The clearest difference is ratings volume: Fela at 214 against Deep In's 4. Fela also leads on iOS requirement (13.0 vs 15.1). Deep In's advantage is review sentiment (100% vs 80%). On price, rating, update cadence and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Fela sells 2 in-app purchases, starting at $15.99 per month and Deep In sells 3 in-app purchases, starting at $29.00 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for Fela against 5.0 for Deep In. That said, the two scores are not equally well evidenced: Fela has 214 ratings behind it against 4, so its average is the more settled of the two. Written reviews are what separate them: 80% of Fela's written reviews are positive against 100% of Deep In's.

UpkeepUpdate frequency

Fela ships an update every 8 days, Deep In every 5 days. The most recent releases landed on October 20, 2026 and October 17, 2026 respectively.

Scorecard3 real differences · 7 level
Fela versus Deep In: the parameters behind the verdict, then further details
ParameterFelaDeep In
PriceFreeFree
Rating4.9 (214 ratings)5.0 (4 ratings) — better
Positive reviews80.0% of reviews100.0% of reviews — better
Number of ratings214 — better4
Update frequencyEvery 8 daysEvery 5 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPodiPhone, iPod
Requires iOS13.0 — better15.1
Further details — not scored
Size64 MB79 MB
Age rating4+17+
DeveloperFela App Inc.DEEP IN

Customer experience

Fela

All ratings98 ratings
Positive98.0%
Neutral1.0%
Negative1.0%
Written reviews15 reviews
Positive80.0%
Neutral0.0%
Negative20.0%

Deep In

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Fela

Subscriptions2
  • 1-Month Plan$15.991 Month
  • 6-Month Plan$47.996 Months
3 purchases

Deep In

Subscriptions3
  • Deep7 Days trial$29.001 Month
  • Deep — 6 Months7 Days trial$139.996 Months
  • Deep — Yearly7 Days trial$239.991 Year

Questions

Is Fela free?
Fela is free to download, with in-app purchases available.
Is Deep In free?
Deep In is free to download, with in-app purchases available.
Which has better reviews, Fela or Deep In?
Deep In is rated higher. Fela averages 4.9 out of 5 from 214 ratings, while Deep In averages 5.0 from 4 ratings.
Do Fela or Deep In have ads?
Neither Fela nor Deep In shows ads.
Which is updated more often, Fela or Deep In?
Fela ships an update every 8 days, and Deep In every 5 days. Most recently, Fela was updated on October 20, 2026 and Deep In on October 17, 2026.

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