Comparison

Sylvi vs Koyo

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

Head to head
About

Sylvi

Practice foreign languages with AI penpals who provide tutor-level feedback on every message. Learn essential phrases, build vocabulary, and stay motivated with friends. Offers a free trial before subscription.

Highlights
  • AI penpals for language practice
  • Real-time message correction and explanation
  • Vocabulary building and memorization tools
  • Practice with friends
  • Streak preservation
  • Flashcards and leaderboard
Features
Read full description

AI penpals that feel like native friends. Tutor-level feedback on every single message. That's Sylvi. You can even pick a penpal with the exact accent you want to have. French (France and Canada) Spanish (Spain, Mexico, Colombia, Puerto Rico, etc) German Italian Portuguese (Portugal and Brazil) English (UK, US, Australia) More languages coming soon - follow our journey on @sylvi_app Too shy to talk to a native speaker? Practice with AI penpals who know you well enough to ask about your day. Every message you send is corrected and explained in real time - not just flagged, but actually taught, so when the real moment comes, you're ready for it. - Learn the phrases you need, for the life you lead Build your vocabulary by saving words important to you. Test yourself daily to memorise them. - Stay accountable with friends Practice with your friends regardless of what language they're learning or what level they're at. "I've used a lot of different language apps... but Sylvi has been the one I've been having the most success with growth-wise. At least from what my tutor tells me." Can't bear to lose your streak? We won't tell. If you've got a streak you can't bear to lose, message us at support@sylvi.ai and we'll transfer it straight to Sylvi. Try us free for 1 week, then pick a subscription that works for you. "I know grammar. I know all of these vocabularies, but you're kind of stuck in the middle of like - how do I become comprehensible? Then I found Sylvi" - Amira, UK "I could say, 'I'm going to the cinema today'. Then if I do Sylvi tomorrow, my penpal will come back and say, 'so what film did you see at the cinema?'. I love the continuity. It's so clever." - James, US

About

Koyo

Learn Nigerian languages like Yoruba, Igbo, and Edo with culturally relevant lessons. Go beyond vocabulary to understand real conversations and connect with people. Features bite-sized daily lessons, real audio, and smart repetition for effective learning.

Highlights
  • Learn Yoruba, Igbo, Edo
  • Cultural context in lessons
  • Real audio and accents
  • Bite-sized daily lessons
  • Exercises for real fluency
  • Smart repetition system
Features
Read full description

Join thousands of learners globally reconnecting with their roots through Yoruba, Igbo, and Edo — the Nigerian language learning app built for real culture and real fluency. Whether you want to learn Yoruba, learn Igbo, or learn Edo, Koyo helps you speak, understand, and belong, not just memorize vocabulary. Every lesson is built with native audio, real accents, and the cultural context textbooks leave out. Maybe you grew up hearing Edo in the kitchen but never learned to speak back. Maybe you're flying into Lagos next month and want to say more than "hello”. Whatever brought you here, you're not too late. Most apps teach you what a word means. Koyo teaches you what it feels like to use it — the right greeting for an elder, the phrase that makes your grandmother smile because you finally got it right. Key Features* •⁠ ⁠Learn Yoruba, Igbo & Edo — structured lessons for beginners and intermediate learners • Real Audio & Real Accents — improve pronunciation with authentic speakers •⁠ ⁠Daily Bite-Sized Lessons — learn in just five minutes a day •⁠ ⁠Exercises for Real Fluency — listening, typing, matching, conversation practice •⁠ ⁠Smart Repetition — remember vocabulary with spaced repetition •⁠ ⁠Cultural Insights — the meaning behind the words, not just the translation Who Koyo is for • Nigerians in the diaspora reconnecting with their heritage •⁠ Anyone who wants to learn Yoruba, Igbo, Edo and many more african languages to come •⁠ Travelers visiting Nigeria •⁠ ⁠Parents teaching Nigerian languages to their children •⁠ ⁠Partners learning their spouse's language •⁠ ⁠Anyone interested in Nigerian culture, Afrobeats, and Nollywood Koyo currently offers Yoruba, Igbo, and Edo, with more Nigerian and African languages on the way. Download Koyo and start speaking Nigerian languages with confidence — one word at a time.

Screenshots

Sylvi4 screens
Koyo4 screens

Verdict

The call

The clearest difference is rating: Sylvi at 4.7 against Koyo's 3.3. Sylvi also leads on review sentiment (83% vs 58%) and ratings volume (300 vs 12). Koyo's advantage is in-app purchases (none vs 25). On price, update cadence, ads and device support 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. Sylvi sells 24 in-app purchases, starting at $2.99 per month. Koyo asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Sylvi holds the better App Store score, 4.7 against 3.3. That said, the two scores are not equally well evidenced: Sylvi has 300 ratings behind it against 12, so its average is the more settled of the two. Written reviews point the same way: 83% of Sylvi's written reviews are positive against 58% of Koyo's.

UpkeepUpdate frequency

Sylvi ships an update every 4 days, Koyo every 5 days. The most recent releases landed on September 24, 2026 and September 9, 2026 respectively.

Scorecard5 real differences · 5 level
Sylvi versus Koyo: the parameters behind the verdict, then further details
ParameterSylviKoyo
PriceFreeFree
Rating4.7 (300 ratings) — better3.3 (12 ratings)
Positive reviews82.7% of reviews — better58.3% of reviews
Number of ratings300 — better12
Update frequencyEvery 4 days — betterEvery 5 days
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPadiPhone, iPod
Requires iOS16.415.6 — better
Further details — not scored
Size134 MB81 MB
Age rating12+12+
DeveloperSylvi LtdKoyo Global Inc.

Customer experience

Sylvi

All ratings300 ratings
Positive92.3%
Neutral1.7%
Negative6.0%
Written reviews202 reviews
Positive82.7%
Neutral2.5%
Negative14.9%

Koyo

All ratings12 ratings
Positive50.0%
Neutral8.3%
Negative41.7%
Written reviews12 reviews
Positive58.3%
Neutral0.0%
Negative41.7%

Bugs and requests

Sylvi

Reported bugs

3 issues
  • Frequent app crashes
  • Subscription issues
  • Inconsistent user experience

Requested features

5 requests
  • Expand language options
  • Improve free version features
  • Implement more personalized learning
  • Add more advanced conversation scenarios
  • Improve speech recognition accuracy

Koyo

Not enough reviews yet to summarise bugs or requests.

In-app purchases

24 purchases

Sylvi

Subscriptions24
  • Sylvi Lite (Monthly)7 Days trial$2.991 Month
  • Sylvi Lite (Monthly)$2.991 Month
  • Sylvi Pro (Monthly)$6.991 Month
Show 21 more
  • Sylvi Pro (Monthly)7 Days trial$6.991 Month
  • Sylvi Lite (Monthly)$6.991 Month
  • Monthly14 Days trial$9.991 Month
  • Monthly7 Days trial$13.991 Month
  • Sylvi Pro (Monthly)$14.991 Month
  • Monthly7 Days trial$19.991 Month
  • 3 months14 Days trial$19.993 Months
  • Sylvi Lite (Annual)14 Days trial$23.991 Year
  • Sylvi Lite (Annual)$23.991 Year
  • Monthly7 Days trial$24.991 Month
  • Sylvi Lite (Annual)$35.991 Year
  • 3 months14 Days trial$39.993 Months
  • 3 months7 Days trial$39.993 Months
  • Annual14 Days trial$49.901 Year
  • Annual7 Days trial$59.991 Year
  • Sylvi Pro (Annual)14 Days trial$59.991 Year
  • Sylvi Pro (Annual)$59.991 Year
  • Sylvi Pro (Annual)$79.991 Year
  • Annual14 Days trial$83.901 Year
  • Annual7 Days trial$89.991 Year
  • Annual7 Days trial$129.991 Year
None

Koyo

No in-app purchases

Questions

Is Sylvi free?
Sylvi is free to download, with in-app purchases available.
Is Koyo free?
Koyo is free to download, with no in-app purchases.
Which has better reviews, Sylvi or Koyo?
Sylvi is rated higher. Sylvi averages 4.7 out of 5 from 300 ratings, while Koyo averages 3.3 from 12 ratings.
Do Sylvi or Koyo have ads?
Neither Sylvi nor Koyo shows ads.
Which is updated more often, Sylvi or Koyo?
Sylvi ships an update every 4 days, and Koyo every 5 days. Most recently, Sylvi was updated on September 24, 2026 and Koyo on September 9, 2026.

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