Comparison

Kernel 背單字 vs SubFit

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

SubFit

Features
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SubFit 是你的「語言健身房」— 不是背單字,而是像健身一樣,把聽力和口說練成肌肉記憶。 ■ 逐句訓練,真正練到「說出來」 每句話帶你走過完整流程:盲聽 → 看聽同步 → 記憶剝離 → 聽中反射 → 開口錄音 → 成果複習。搭配間隔重複,該複習的句子自動幫你排程,記得牢。 ■ 把你喜歡的內容變成課程 拒絕硬聽不想聽的教材。匯入你愛的電影影集字幕、雜誌(拍照 OCR / 掃 QR Code),SubFit 自動斷句、翻譯,變成你的私人課程。學你真正想學的內容,才撐得過每天的練習。 ■ AI 講解,秒懂「母語者為什麼這樣說」 每句都能請 AI 解析:核心語感、句型骨架、替換例句,抓到語言背後的邏輯,不只死記。 ■ 多語言、多口音 支援英文、日文、韓文、荷蘭文、法文;英文另有美式、英式、澳洲、印度、加拿大五種口音,挑你耳朵最需要適應的那一種。 ■ 練習有回饋 XP、等級、連續天數、排行榜,讓每天開口都有成就感。 現在就開始,把你聽的每一段內容,變成你說得出口的能力。 訂閱方案(自動續訂) ・SubFit Plus — 每月 NT$69 每月 200 句新句訓練、全部語音與口音、無限 AI 講解、課程雲端備份與跨裝置同步 ・SubFit Pro — 每月 NT$115 無限句訓練,並包含 Plus 全部功能,另可匯出 SRT 字幕與含 AI 解析的 Anki 卡片 免費版可使用預設語音,並享有每月免費訓練額度。 訂閱於購買時向你的 Apple ID 帳戶收費,並於每期結束前24 小時內自動續訂,除非事先取消。可隨時於 App Store帳戶設定中管理或取消訂閱。 服務條款(EULA):https://blog.subfit.app/terms 隱私政策:https://blog.subfit.app/privacy

Screenshots

Kernel 背單字4 screens
SubFit4 screens

Verdict

The call

The clearest difference is in-app purchases: Kernel 背單字 at none against SubFit's 2. SubFit's advantage is ads (none vs shown) and iOS requirement (15.0 vs 17.0). On price, update cadence 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. SubFit sells 2 in-app purchases, starting at $1.99 per month. Kernel 背單字 asks for nothing beyond the download.

UpkeepUpdate frequency

Kernel 背單字 ships an update weekly, SubFit every 10 days. The most recent releases landed on September 19, 2026 and September 9, 2026 respectively.

Scorecard3 real differences · 3 level
Kernel 背單字 versus SubFit: the parameters behind the verdict, then further details
ParameterKernel 背單字SubFit
PriceFreeFree
Update frequencyWeekly — betterEvery 10 days
AdsYesNo — better
In-app purchasesNo — betterYes
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.0 — better
Further details — not scored
Size63 MB12 MB
Age rating4+4+
DeveloperEgan BismaCheng-Gang Wang

In-app purchases

None

Kernel 背單字

No in-app purchases

2 purchases

SubFit

Subscriptions2
  • SubFit Plus 會員$1.991 Month
  • SubFit Pro 會員$3.991 Month

Questions

Is Kernel 背單字 free?
Kernel 背單字 is free to download, with no in-app purchases.
Is SubFit free?
SubFit is free to download, with in-app purchases available.
Do Kernel 背單字 or SubFit have ads?
Kernel 背單字 shows ads; SubFit does not.
Which is updated more often, Kernel 背單字 or SubFit?
Kernel 背單字 ships an update weekly, and SubFit every 10 days. Most recently, Kernel 背單字 was updated on September 19, 2026 and SubFit on September 9, 2026.

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