# Prolog Language Courses vs Clozemaster－Vocabulary Builder

The clearest difference is review sentiment: Clozemaster－Vocabulary Builder at 83% against Prolog Language Courses's 0%. Clozemaster－Vocabulary Builder also leads on update cadence (every 11 days vs every 5 months). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Prolog Language Courses sells 19 in-app purchases, starting at $7.99 per month and Clozemaster－Vocabulary Builder sells 8 in-app purchases, starting at $8.99 per month. Whichever you choose, the download price is not the number that matters.

Prolog Language Courses ships an update every 5 months, Clozemaster－Vocabulary Builder every 11 days. Both last shipped on October 29, 2026.

## The numbers

| Metric | Prolog Language Courses | Clozemaster－Vocabulary Builder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (2.1K ratings)](https://appshunter.io/ios/app/clozemastervocabulary-builder/id1149199075/reviews)** |
| Number of ratings | — | **2.1K** |
| Positive reviews | 0.0% of reviews | **82.5% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 11 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 54 MB | 83 MB |
| Requires iOS | **15.6** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | +12 |
| Developer | [Prolog LTD](https://appshunter.io/developer/359022156) | [Language Innovation LLC](https://appshunter.io/developer/1149199074) |

## What reviewers say

### Prolog Language Courses

[App page](https://appshunter.io/ios/app/prolog-language-courses/id718985854)

Learn new languages with interactive lessons featuring audio and text. Access dozens of free lessons, with options to upgrade to full courses for a low price. Study anytime, anywhere, with a focus on listening, reading, and speaking.

**Highlights:** Interactive audio and text lessons, Dozens of free lessons, Full course upgrades available, Learn English, French, German, Spanish, and more, Phrasebooks for various languages, Study on the go

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

**In-app purchases (19)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Speakit.tv — 1 Month | $7.99 | per month |
| Speakit.tv — 3 Months | $22.99 | per 3 months |
| Speakit.tv — 6 Months | $44.99 | per 6 months |
| Hebräisch – Sprachführer | $5.99 | one-time |
| Hébreu Manuel de conversation | $5.99 | one-time |
| HEBREO Manual de Conversación | $5.99 | one-time |
| Иврит – разговорник | $5.99 | one-time |
| HEBREW - Let's speak! | $7.99 | one-time |
| Hebrew - on Video! | $14.99 | one-time |
| Spanish - on Video! | $14.99 | one-time |
| Inglés - ¡En vídeo! | $14.99 | one-time |
| Portugués - ¡En vídeo! | $14.99 | one-time |
| Иврит по видео | $14.99 | one-time |
| Английский по видео | $14.99 | one-time |
| الإنكليزية - بالفيديو! | $14.99 | one-time |
| Hebrew Ulpan Video Course | $17.99 | one-time |
| Hebrew Verbs and Conjugations | $20.99 | one-time |
| Welcome to Hebrew | $24.99 | one-time |
| HEBREW - Let's Speak! | $24.99 | one-time |


### 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


## Frequently asked questions

### Is Prolog Language Courses free?

Prolog Language Courses is free to download, with in-app purchases available.

### Is Clozemaster－Vocabulary Builder free?

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

### Do Prolog Language Courses or Clozemaster－Vocabulary Builder have ads?

Neither Prolog Language Courses nor Clozemaster－Vocabulary Builder shows ads.

### Which is updated more often, Prolog Language Courses or Clozemaster－Vocabulary Builder?

Prolog Language Courses ships an update every 5 months, and Clozemaster－Vocabulary Builder every 11 days. Most recently, Prolog Language Courses was updated on October 29, 2026 and Clozemaster－Vocabulary Builder on October 29, 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.*