Comparison

KensAI vs Polyglob

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

Head to head
About

KensAI

Features
Read full description

Everything you need for your Japanese learning journey and JLPT preparation is in one place! Rapidly close your vocabulary, kanji, and grammar gaps with our personalized, AI-powered exercises. Kensai leaves behind boring, traditional memorization methods. By combining a scientifically proven Spaced Repetition System (SRS) with the latest AI technology, it embeds Japanese into your long-term memory naturally and effectively. KEY FEATURES: Interactive Grammar & Smart Examples: Instantly grasp grammar rules with rich, AI-generated context. Tap on any word in a sentence to see its meaning, form, and correct usage instantly. Comprehensive JLPT Practice: Practice with 100% exam-accurate questions designed to help you master Japanese at your own pace and reach your proficiency goals. Advanced SRS Algorithm: Create a permanent learning loop. Kensai brings back vocabulary and kanji right before you are about to forget them. Contextual Visual Memory: Connect words with AI-generated visuals tailored to real-life contexts, helping you learn visually, not just through text. Your Cute Learning Companion: Learning is never boring when you're accompanied by our carefully crafted, adorable mascot who pops up to keep you motivated and on track! UNLOCK LIMITS WITH KENSAI PRO Download Kensai for free and start learning with our core features. Upgrade to Kensai Pro to reach your Japanese goals faster, gain unlimited access to our study materials, and unlock all AI-powered tools (contextual word analysis, unlimited practice). Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Polyglob

Engage in daily language practice through bite-sized, real-life lessons. Master new vocabulary and grammar with interactive quizzes, flashcards, and cultural insights. Build a consistent learning habit and track your progress with engaging activities.

Highlights
  • Short, real-life story and dialogue lessons
  • Audio for listening comprehension
  • Typed quizzes with feedback
  • Flashcards from lessons
  • Grammar and culture cheatsheets
  • Daily streak tracking
  • Trophy World rewards
Features
Read full description

Polyglob is a language course built around tiny real-life lessons and active review. Start a free course, then come back to short story/dialogue lessons with audio, typed quizzes, flashcards, quick-reference cheatsheets, culture articles, custom creations, and weekly recaps. Each lesson focuses on one everyday situation, like ordering, greetings, directions, travel, workplace small talk, or polite requests. Read or listen, check translations and pronunciation notes, then practice what you learned with cards, quizzes, and quick games. What you can do in Polyglob: - Learn with short beginner-friendly story and dialogue lessons - Listen to lesson audio and review useful phrases - Take typed quizzes with translations nearby - See quiz feedback on what went well and what to improve - Study flashcards created from your lessons - Open a course cheatsheet for grammar, phrases, and cultural tips - Choose Easy, Medium, or Hard for custom lessons - Create custom articles - Build a daily streak through lessons, articles, flashcards, quizzes, and games - Earn blue stars from quizzes and spend them on language treasures in Trophy World Polyglob supports courses including Spanish, French, Japanese, Korean, Chinese, Thai, Italian, and German. Start free, then subscribe for more weekly lessons, culture articles, and the ability to tune their difficulty. Terms of Use: https://polyglob.com/terms

Screenshots

KensAI4 screens
Polyglob4 screens

Verdict

The call

The clearest difference is update cadence: Polyglob at every 3 days against KensAI's fortnightly. Polyglob also leads on iOS requirement (13.0 vs 15.5). On price, ads, in-app purchases 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. KensAI sells 3 in-app purchases, starting at $3.99 per 7 days and Polyglob sells 11 in-app purchases, starting at $10.00 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

KensAI ships an update fortnightly, Polyglob every 3 days. The most recent releases landed on October 24, 2026 and October 12, 2026 respectively.

Scorecard2 real differences · 7 level
KensAI versus Polyglob: the parameters behind the verdict, then further details
ParameterKensAIPolyglob
PriceFreeFree
Rating—5.0 (3 ratings) — better
Number of ratings—3 — better
Update frequencyFortnightlyEvery 3 days — better
AdsNoNo
In-app purchasesYesYes
Monetization—Freemium
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.513.0 — better
Further details — not scored
Size103 MB35 MB
Age rating4+4+
DeveloperSuat OZKAYAMikan Labs Inc.

In-app purchases

3 purchases

KensAI

Subscriptions3
  • KensAI Weekly$3.997 Days
  • KensAI Monthly3 Days trial$9.991 Month
  • KensAI Annual$59.991 Year
11 purchases

Polyglob

Subscriptions10
  • Learn Thai Monthly7 Days trial$10.001 Month
  • Learn Japanese Monthly7 Days trial$10.001 Month
  • Learn Chinese Monthly7 Days trial$10.001 Month
Show 7 more
  • Learn Italian Monthly7 Days trial$10.001 Month
  • Learn Korean Monthly7 Days trial$10.001 Month
  • Learn Spanish Monthly7 Days trial$10.001 Month
  • Learn French Monthly7 Days trial$10.001 Month
  • Learn German Monthly7 Days trial$10.001 Month
  • Polyglob Plus Monthly$12.991 Month
  • Polyglob Plus Yearly$119.991 Year
One-time1
  • 3 Creation Credits$2.99

Questions

Is KensAI free?
KensAI is free to download, with in-app purchases available.
Is Polyglob free?
Polyglob is free to download, with in-app purchases available.
Do KensAI or Polyglob have ads?
Neither KensAI nor Polyglob shows ads.
Which is updated more often, KensAI or Polyglob?
KensAI ships an update fortnightly, and Polyglob every 3 days. Most recently, KensAI was updated on October 24, 2026 and Polyglob on October 12, 2026.

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