# Clozemaster－Vocabulary Builder vs Klock.io

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.

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.

## The numbers

| Metric | Clozemaster－Vocabulary Builder | Klock.io |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (2.1K ratings)](https://appshunter.io/ios/app/clozemastervocabulary-builder/id1149199075/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/klockio/id6811347852/reviews)** |
| Number of ratings | **2.1K** | 1 |
| Positive reviews | 82.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 11 days | **Daily** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 83 MB | 3 MB |
| Requires iOS | **16.4** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | +12 | 4+ |
| Developer | [Language Innovation LLC](https://appshunter.io/developer/1149199074) | [Aaron Jabamani](https://appshunter.io/developer/6811347854) |

## What reviewers say

### Clozemaster－Vocabulary Builder

[App page](https://appshunter.io/ios/app/clozemastervocabulary-builder/id1149199075)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Clozemaster Pro Monthly | $8.99 | per month |
| Clozemaster Pro Monthly | $12.99 | per month |
| Clozemaster Pro Monthly | $12.99 | per month |
| Clozemaster Pro Yearly | $69.99 | per year |
| Clozemaster Pro Yearly | $79.99 | per year |
| Clozemaster Pro Annual | $79.99 | per year |
| Clozemaster Pro Annual | $79.99 | per year |
| Clozemaster Pro Yearly | $79.99 | per year |

**What reviewers like**

- 👍 Great for learning vocabulary and grammar
- 🚀 Effective spaced repetition and context-based learning
- 🎮 Gamified and enjoyable learning experience
- 🌐 Wide range of languages available, including rare ones
- 💡 Useful sentence explanations and grammar insights

**What reviewers complain about**

- 🐛 Occasional issues with audio quality and TTS
- 💰 Subscription model considered too expensive by some
- 🔍 Limited free version with daily sentence cap
- 🤖 Concerns about over-reliance on AI-generated content
- 🤔 Not suitable for complete beginners in a language

**Reported bugs**

- Crashes and performance issues on older devices
- Incorrect translations and sentence examples
- Inconsistencies in language-specific features

**Requested features**

- 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

[App page](https://appshunter.io/ios/app/klockio/id6811347852)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Clozemaster－Vocabulary Builder free?

Clozemaster－Vocabulary Builder is free to download, with in-app purchases available.

### Is Klock.io free?

Klock.io is free to download, with no in-app purchases.

### Which has better reviews, Clozemaster－Vocabulary Builder or Klock.io?

Klock.io is rated higher. Clozemaster－Vocabulary Builder averages 4.8 out of 5 from 2.1K ratings, while Klock.io averages 5.0 from 1 ratings.

### Do Clozemaster－Vocabulary Builder or Klock.io have ads?

Neither Clozemaster－Vocabulary Builder nor Klock.io shows ads.

### Which is updated more often, Clozemaster－Vocabulary Builder or Klock.io?

Clozemaster－Vocabulary Builder ships an update every 11 days, and Klock.io daily. Most recently, Clozemaster－Vocabulary Builder was updated on November 2, 2026 and Klock.io on October 31, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*