Comparison

Most Common Words vs knockOut Study

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

Head to head
About

Most Common Words

Master 31 languages with 3,000 essential words and over 100,000 example sentences. Features hands-free learning, spaced repetition, quizzes, and offline access. Sync progress across devices and personalize your studies with custom word lists.

Highlights
  • 3,000 essential vocabulary words
  • 100,000+ example sentences
  • Hands-free learning
  • Spaced repetition system
  • Interactive quizzes
  • Offline access
  • Progress sync across devices
Features
Read full description

Master 31 languages effortlessly with 3k essential vocabulary words, over 100k example sentences, hands-free learning, quizzes, spaced repetition, sync, dictionary, and notifications - Perfect for beginners and advanced learners - 3000 words are all you need to express yourself and have everyday conversations in a language easily. This app has all the most common ones that are essential to know for everyday conversations, always available on your phone, anywhere, anytime, even while offline. - 100k+ example sentences with native pronunciation to put vocabulary into real conversation context - Automatic and flexible spaced repetition, so you will always see and practice the words that are the most beneficial to review based on last review time, number of times reviews, and current status of the word - Filter by levels (A1, A2, B1, B2), over 100 topics, categories, and sub-categories (e.g. family, food, entertainment, home, time, work, nature, body, travel, society, feelings, health, education, technology), and parts of speech (adjectives, nouns, verbs, adverbs, pronouns, prepositions, conjunctions) - Study without even opening the app, on your lock screen or smartwatch, with flexibly scheduled notifications - Flashcard autoplay and auto-pronounce loops over your flashcards for times when you are multi-tasking and cannot use your hands for an effortless hands-free learning experience (so you can learn even when working, watching a movie, or doing chores) - Practice with your favorite interactive quiz types to master your vocabulary (there are a total of 9 practice quiz types with 36 total variations regarding hint, answer type, and language) - Easily accessible dictionary that lets you search with keywords, and you can even expand your search to all 100k+ example sentences that contain the given keywords - Backup and sync your word progress, stars, statistics, and practices across all devices in real-time so that you can pick up any of your devices with the latest state already synced - Stick to your goals by setting a daily review goal, and optional daily notifications to remind you to study - You can understand your current study level and progress and monitor the current states of all 3000 most common words with a single glance from the main screen - Add your own words and tags with instant auto-translate for faster adding - Import your own word lists from plaintext files with flexible delimiters (comma, semicolon, tab, or custom separators) to personalize your learning experience with specialized vocabulary from your textbooks, work, or interests - Home screen widget keeps your learning active by cycling through your currently studying words directly on your phone's home screen - review vocabulary without even opening the app - Core features are free forever, while extra features can be unlocked by in-app purchases The following translations translations are supported for English learners, or speakers: Spanish, French, German, Hungarian, Italian, Portuguese, Danish, Dutch, Finnish, Norwegian, Polish, Romanian, Slovak, Slovenian, Swedish, Estonian, Croatian, Czech, Indonesian, Turkish, Chinese, Arabic, Lithuanian, Japanese, Korean, Russian, Ukrainian, Hindi, Afrikaans, Vietnamese Conjugations are available for English, German, Italian, Spanish, French, Dutch, Portuguese, Finnish, Indonesian, Romanian, Danish Reader and Books are available for people studying German, Spanish, Italian, Spanish, and Dutch from English

About

knockOut Study

Features
Read full description

You've done the streaks. You've drilled the vocab lists. You still freeze when someone speaks to you. knockOut builds lessons around your vocabulary — not a preset curriculum. AI. Comprehensible input. Real progress. HOW IT WORKS You pick your words. The AI generates full lessons around them — reading passages, listening exercises, context-rich content built for your level and interests. As you read and listen, you naturally encounter new words and concepts. knockOut tracks them. Next session, those words come back — woven into new content, reinforced through context. Not dumb buttons. Not drilling. The language builds itself into you, the way it's supposed to. WHAT MAKES IT DIFFERENT • Lessons built around your vocabulary, not ours • New AI-generated content every session • 6-level mastery system — not streak counters • No gamification. No fake progress. • Works for any language, any level Serious learners. The kind who've been burned by apps that turned language learning into a mobile game. If you want an app that congratulates you for opening it, this isn't it. If you want to actually speak the language — start here. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privcay policy: https://knockoutstudy.com/privacy-policy.html

Screenshots

Most Common Words4 screens
knockOut Study3 screens

Verdict

The call

The clearest difference is update cadence: knockOut Study at every 5 days against Most Common Words's every 6 weeks. 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. Most Common Words sells 5 in-app purchases, starting at $12.99 per month and knockOut Study sells 3 in-app purchases, starting at $8.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Most Common Words ships an update every 6 weeks, knockOut Study every 5 days. The most recent releases landed on October 2, 2026 and October 5, 2026 respectively.

Scorecard1 real difference · 8 level
Most Common Words versus knockOut Study: the parameters behind the verdict, then further details
ParameterMost Common WordsknockOut Study
PriceFreeFree
Rating5.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyEvery 6 weeksEvery 5 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS16.615.5 — better
Further details — not scored
Size104 MB306 MB
Age rating4+4+
DeveloperDominik GyecsekMAKSYM KHAMAD

In-app purchases

5 purchases

Most Common Words

Subscriptions3
  • Monthly Pro$12.991 Month
  • Yearly Pro7 Days trial$59.991 Year
  • Yearly Pro7 Days trial$79.991 Year
One-time2
  • Lifetime Pro2 variants$79.99
  • Lifetime Pro2 variants$119.99
3 purchases

knockOut Study

Subscriptions2
  • knockOut Pro Monthly$8.991 Month
  • knockOut Pro Monthly$73.901 Year
One-time1
  • knockOut Pro Life$99.99

Questions

Is Most Common Words free?
Most Common Words is free to download, with in-app purchases available.
Is knockOut Study free?
knockOut Study is free to download, with in-app purchases available.
Do Most Common Words or knockOut Study have ads?
Neither Most Common Words nor knockOut Study shows ads.
Which is updated more often, Most Common Words or knockOut Study?
Most Common Words ships an update every 6 weeks, and knockOut Study every 5 days. Most recently, Most Common Words was updated on October 2, 2026 and knockOut Study on October 5, 2026.

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