Comparison

Kernel 背單字 vs Lingo Diary

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

Head to head
About

Kernel 背單字

Features
Read full description

Here's the translation: 【From a Cornell University Startup Team — The AI GSAT Vocabulary Partner That Truly Gets You】 Let's be honest — traditional vocabulary books and flashcards have no way of verifying whether you've actually retained the words. Kernel Vocab, developed by a Cornell University startup team and designed specifically for GSAT test-takers, combines cutting-edge behavioral science with AI algorithms to permanently break the vicious cycle of memorizing and forgetting. Core Features: ● Proprietary MSRS Memory Engine: This isn't your ordinary flashcard app! Our pioneering multi-modal memory algorithm cross-tests you through a variety of formats — flashcards, multiple choice, cloze exercises, and more. It precisely predicts your brain's "forgetting curve," automatically skips words you already know, and zeroes in on your exact memory weak spots to maximize review efficiency. ● Real Exam Practice: Still going through words alphabetically two weeks before the test? Kernel lets you switch strategies in one tap based on your prep timeline, and generates questions using real past GSAT exam contexts. Every word you study and every sentence you read is an actual tested point from real exams. ● Pet Companions & Community Motivation: Instead of white-knuckling your way through study sessions, open the app because you can't bear to let your pet go hungry! Through gamification mechanics and peer community dynamics, you'll stick with it "painlessly" all the way to exam day — building a powerful habit of daily automatic learning. Your GSAT prep starts with Kernel. Contact Us: Website: https://kerneltech.app Support: hello@kerneltech.app

About

Lingo Diary

Features
Read full description

You know more than you think. If AI understands you, so will a native speaker. Stop dreading conversations. Start actually enjoying them! Lingo Diary is perfect for you — • Mind goes blank the moment you try to speak? Type or use voice messages. It feels like texting a friend, not studying. • Worried your grammar or vocabulary isn't good enough? Just say it in English. No judgment. AI gives feedback so the right phrases stick over time. • Only have small pockets of time to practice? Open the app and talk about anything. Work stress, weekend plans, whatever's on your mind. --- 【 Learn Chinese, Japanese, or Korean — Anytime, No Pressure 】 Use the vocabulary you have. Type or speak at your own pace. The more you chat, the more you'll want to. 【 Sound and Listen Like a Native 】 Get pronunciation demos for your voice messages. AI voice replies sound genuinely human. Use Listening Mode to hear before you read and train your ear to catch real, natural speech. 【 Stuck? Just Say It in English 】 Can't find the word? Type in English and keep going. No frustration, no stopping. 【 Real-Time Feedback to Say It Better 】 You write a line, AI polishes it. Pick up natural phrasing through real conversations, no extra studying needed. 【 Your Personal Lingo Diary, Generated Automatically 】 Every chat becomes a diary entry. Review anytime and see how far you've come. Lingo Diary is built by a small team in Taiwan on a mission to make language learning feel a little less like work. Questions or feedback? Find us on Instagram @lingodiary.app_tw - Terms of Use: https://lingodiary.app/zh-tw/terms Privacy Policy: https://lingodiary.app/zh-tw/privacy

Screenshots

Kernel 背單字4 screens
Lingo Diary4 screens

Verdict

The call

The clearest difference is in-app purchases: Kernel 背單字 at none against Lingo Diary's 3. 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. Lingo Diary sells 3 in-app purchases, starting at $9.99 per month. Kernel 背單字 asks for nothing beyond the download.

UpkeepUpdate frequency

Kernel 背單字 ships an update weekly, Lingo Diary every 9 days. The most recent releases landed on September 19, 2026 and July 11, 2026 respectively.

Scorecard1 real difference · 5 level
Kernel 背單字 versus Lingo Diary: the parameters behind the verdict, then further details
ParameterKernel 背單字Lingo Diary
PriceFreeFree
Update frequencyWeekly — betterEvery 9 days
AdsYesYes
In-app purchasesNo — betterYes
DevicesiPhone, iPad — betteriPhone
Requires iOS17.0 — better18.0
Further details — not scored
Size63 MB44 MB
Age rating4+4+
DeveloperEgan BismaSPARKLECT CO.,LTD.

In-app purchases

None

Kernel 背單字

No in-app purchases

3 purchases

Lingo Diary

Subscriptions3
  • Plus$9.991 Month
  • Pro3 Days trial$12.991 Month
  • Max7 Days trial$19.991 Month

Questions

Is Kernel 背單字 free?
Kernel 背單字 is free to download, with no in-app purchases.
Is Lingo Diary free?
Lingo Diary is free to download, with in-app purchases available.
Do Kernel 背單字 or Lingo Diary have ads?
Both Kernel 背單字 and Lingo Diary show ads.
Which is updated more often, Kernel 背單字 or Lingo Diary?
Kernel 背單字 ships an update weekly, and Lingo Diary every 9 days. Most recently, Kernel 背單字 was updated on September 19, 2026 and Lingo Diary on July 11, 2026.

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