Clozemaster-Vocabulary Builder vs Klock.io
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Clozemaster-Vocabulary Builder
Master vocabulary in over 50 languages through engaging cloze tests. Learn words in real-world sentence contexts, track progress, and compete globally. Offers multiple learning modes and grammar explanations.
- Cloze tests for vocabulary learning
- Learn vocabulary in context
- Over 50 languages available
- Gamified learning with leaderboards
- Multiple learning modes (Vocabulary, Listening, Speaking)
- Grammar explanations
- Adjustable speaking speed
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Learn 50+ languages with Clozemaster — the gamified language learning app for A2-C1 learners to master vocabulary by filling in missing words in real-world contexts. [ MASTER LANGUAGES WITH THE CLOZE TEST METHOD ] • Level up your language skills with cloze tests, where you fill in the missing word, challenging you to complete sentences. • Learn vocabulary in context, moving beyond single-word flashcards to complete sentences drawn from real-life scenarios. [ CONTEXTUAL LEARNING FOR REAL-WORLD FLUENCY ] • Experience language as it's used in daily life; learn by completing thousands of sentences in over 50 languages. • Progress through sentences sorted by frequency, focusing first on the words you're most likely to use. [ EXPLORE A WEALTH OF LANGUAGES ] • Play over 50 languages - Afrikaans, Albanian, Amharic, Arabic, Armenian, Azerbaijani, Basque, Belarusian, Bengali, Breton, Bulgarian, Cantonese, Catalan, Cornish, Croatian, Czech, Danish, Dutch, English (Ingles), Esperanto, Estonian, Finnish, French, Galician, Georgian, German, Greek, Guarani, Hebrew, Hindi, Hungarian, Icelandic, Indonesian, Interlingue, Irish, Italian, Japanese, Kazakh, Korean, Latin, Latvian, Lithuanian, Lojban, Macedonian, Mandarin Chinese, Maori, Nahuatl, Norwegian, Persian Farsi, Polish, Portuguese, Romanian, Russian, Scottish Gaelic, Serbian, Slovak, Slovenian, Spanish (Español), Swahili, Swedish, Tagalog, Thai, Toki Pona, Turkish, Ukrainian, Vietnamese, Welsh, Yiddish. • Each language offers authentic phrases and expressions, enhancing cultural understanding. [ GAMIFY YOUR LEARNING JOURNEY ] • Score points for correct answers, competing on a global leaderboard to make learning engaging and rewarding. • Tackle language challenges to stay motivated, with gamified exercises enhancing your daily learning. [ TAILOR YOUR LANGUAGE EXPERIENCE ] • Adjust the speaking speed to match your comprehension level, catering to learners at all stages. • Visual progress tracking and spaced repetition help you climb the leaderboard and master sentences efficiently. [ DIVERSE LEARNING MODES FOR A HOLISTIC APPROACH ] • Engage with three distinct modes - Vocabulary, Listening, and Speaking - to cater to different aspects of language learning. • Try out the beta feature 'Radio' for a hands-free learning experience, listening to sentences with translations and thoughtful pauses. [ INTERACTIVE LEARNING SUPPORT ] • If you answer incorrectly, tap "Explain" for detailed grammar explanations, aiding your understanding and retention. [ FREE TO PLAY, RICH IN LEARNING ] • Start your language learning journey for free, with essential features accessible to all users. • Choose to upgrade to Clozemaster Pro for a more comprehensive and customized learning experience. [ UNLOCK ADVANCED FEATURES ] • Gain unlimited access to advanced learning features and in-depth exercises with the Pro version. • Create and share custom sentence collections, allowing for a tailored and personalized learning experience. • Access a vast library of grammar challenges and exclusive content, enhancing your linguistic proficiency. Download Clozemaster now and transform your approach to language learning. Whether you are a beginner or an advanced learner, Clozemaster offers a unique and effective way to expand your vocabulary and understand the intricacies of over 50 languages. • Upon confirming your purchase, the charge will be applied to your Apple account. • To provide uninterrupted service, subscriptions renew automatically. Your account will be charged for renewal within 24 hours before the end of the current period. • Manage auto-renewal settings anytime by adjusting your preferences in the App Store. • For a deeper understanding of our policies, please review https://www.clozemaster.com/terms For support or feedback, contact us at hello@clozemaster.com Start your journey to language mastery today!
Klock.io
This app acts as a pacing tool for UK university admissions tests like ESAT and TMUA. It times each question individually, showing students if they are ahead or behind pace, helping them manage their time effectively during exams.
- Individual question timing
- Pacing status (ahead/behind)
- Per-question breakdown
- Customizable exam targets
- Syllabus point tagging
- Live Activity on Lock Screen
- Compact iPad timer window
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Klock is a pacing tool for UK sixth-formers preparing for university admissions tests — currently the ESAT and TMUA, plus legacy ENGAA, NSAA and CAIE papers scored against the ESAT standard. These exams allocate a fixed number of seconds per question with no negative marking, so the dominant failure mode isn't lack of knowledge — it's spending too long on one question and never reaching the rest of the paper. Klock times a past paper the way the real exam is timed and shows the candidate, question by question, whether they are ahead of or behind the pace they need to finish. It targets UK Year 12–13 students applying to STEM courses at Oxford, Imperial and similar universities that require these admissions tests. WHAT IT TELLS YOU THAT A STOPWATCH CANNOT Every question is timed on its own, including the time you spend when you go back to one. Afterwards you get a per-question breakdown — on pace, slightly over, well over — so you can see which questions took the paper away from you, not just that it ran out. That is the difference between knowing you were four minutes short and knowing that question 14 cost you six. ONE TARGET, EVERY PAPER You tell Klock which exam you are preparing for once. Every paper you time is then graded against that target, whichever exam it came from — so ENGAA and NSAA past papers count as ESAT pacing evidence, and the numbers stay comparable. Extra-time entitlements scale the target proportionally. ESAT 27 questions in 40 minutes 1:28.9 per question TMUA 20 questions in 75 minutes 3:45.0 per question Practice with ENGAA, NSAA and CAIE Physics past papers, all with their official durations read off the papers' own cover pages. A paper that isn't in the list can be named and timed at its section's official format. TOPICS, NOT JUST TIMES Questions carry the syllabus points they test, taken verbatim from the official subject guides. Tag your own as you review — the spec code sits next to every label, because the code is what you look up in the guide — and the tags stay on the question, so a paper you come back to still says what each one was testing. ANSWER EVERYTHING Neither ESAT nor TMUA penalises a wrong answer, so a blank is a mark given away for nothing. Mark questions as answered while you work, and when the time left no longer covers putting something in every empty box, Klock says so in a way you cannot miss. ALSO • Live Activity on the Lock Screen and Dynamic Island, with a Next Question button you can reach without unlocking • A compact timer window that sits beside your PDF on iPad • Per-session CSV export — one row per question, with its lap time, target and pacing status • Nothing is lost to backgrounding, locking or a relaunch: every clock is derived from stored dates, never from a ticking counter PRIVACY No account. No server. No analytics. Ever. Everything stays on your device, and the privacy label says "Data Not Collected" because that is true. Klock is not affiliated with, endorsed by, or connected to UAT-UK, Cambridge Assessment Admissions Testing, or Cambridge Assessment International Education. ESAT, TMUA, ENGAA and NSAA are their respective owners' marks and are used here only to describe the papers this app helps you practise.
Screenshots
Verdict
The clearest difference is in-app purchases: Klock.io at none against Clozemaster-Vocabulary Builder's 10. Clozemaster-Vocabulary Builder's advantage is ratings volume (2.1K vs 1) and iOS requirement (16.4 vs 18.0). On price, rating, update cadence and ads 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
Both are free to download. Clozemaster-Vocabulary Builder sells 8 in-app purchases, starting at $8.99 per month. Klock.io asks for nothing beyond the download.
Klock.io holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Clozemaster-Vocabulary Builder has 2.1K ratings behind it against 1, so its average is the more settled of the two.
Clozemaster-Vocabulary Builder ships an update every 11 days, Klock.io daily. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.
| Parameter | Clozemaster-Vocabulary Builder | Klock.io |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (2.1K ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 82.5% of reviews | — |
| Number of ratings | 2.1K — better | 1 |
| Update frequency | Every 11 days | Daily — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.4 — better | 18.0 |
| Further details — not scored | ||
| Size | 83 MB | 3 MB |
| Age rating | +12 | 4+ |
| Developer | Language Innovation LLC | Aaron Jabamani |
Customer experience
Clozemaster-Vocabulary Builder
Klock.io
Bugs and requests
Clozemaster-Vocabulary Builder
Reported bugs
3 issues- Crashes and performance issues on older devices
- Incorrect translations and sentence examples
- Inconsistencies in language-specific features
Requested features
5 requests- Ability to add custom sentences and vocabulary
- More detailed grammar explanations and lessons
- Integration with other language learning resources
- Improved user interface and navigation
- Offline mode with full functionality
Klock.io
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Clozemaster-Vocabulary Builder
- Clozemaster Pro Monthly$8.991 Month
- Clozemaster Pro Monthly2 variants$12.991 Month
- Clozemaster Pro Monthly1 Month trial2 variants$12.991 Month
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- Clozemaster Pro Yearly$69.991 Year
- Clozemaster Pro Yearly$79.991 Year
- Clozemaster Pro Annual1 Year trial$79.991 Year
- Clozemaster Pro Annual7 Days trial$79.991 Year
- Clozemaster Pro Yearly7 Days trial$79.991 Year
Klock.io
No in-app purchases
Questions
Is Clozemaster-Vocabulary Builder free?
Is Klock.io free?
Which has better reviews, Clozemaster-Vocabulary Builder or Klock.io?
Do Clozemaster-Vocabulary Builder or Klock.io have ads?
Which is updated more often, Clozemaster-Vocabulary Builder or Klock.io?
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