# FluentU vs Sentence Lab

The clearest difference is rating: FluentU at 4.3 against Sentence Lab's 3.0. FluentU also leads on ratings volume (2.8K vs 1) and update cadence (every 10 days vs every 6 weeks). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. FluentU sells 8 in-app purchases, starting at $17.99 per month and Sentence Lab sells 2 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

FluentU holds the better App Store score, 4.3 against 3.0. That said, the two scores are not equally well evidenced: FluentU has 2.8K ratings behind it against 1, so its average is the more settled of the two.

FluentU ships an update every 10 days, Sentence Lab every 6 weeks. The most recent releases landed on November 11, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | FluentU | Sentence Lab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (2.8K ratings)](https://appshunter.io/ios/app/fluentu-learn-language-videos/id917892175/reviews)** | [3.0 (1 ratings)](https://appshunter.io/ios/app/sentence-lab/id6760779281/reviews) |
| Number of ratings | **2.8K** | 1 |
| Positive reviews | 56.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 6 weeks |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 545 MB | 43 MB |
| Requires iOS | 16.4 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Enux Education Limited](https://appshunter.io/developer/917892174) | [JEFFREY ROBERT SANCHEZ](https://appshunter.io/developer/1886201837) |

## What reviewers say

### FluentU

[App page](https://appshunter.io/ios/app/fluentu-learn-language-videos/id917892175)

Learn languages through engaging, real-world videos like movie trailers and music clips. Interactive subtitles and vocabulary quizzes make learning immersive and natural. Connect with culture while mastering a new language.

**Highlights:** Learn with interactive videos, Tap words for instant definitions, Vocabulary quizzes, Bilingual dictionary, Track progress, Cultural immersion

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FluentU Plus | $17.99 | per month |
| FluentU Plus | $29.99 | per month |
| FluentU Super Monthly | $39.99 | per month |
| FluentU Plus | $95.99 | per year |
| FluentU Plus | $119.99 | per year |
| FluentU Plus | $139.99 | per year |
| FluentU Super Annual | $199.99 | per year |
| FluentU Plus | $239.99 | per year |

**What reviewers like**

- 🚀 Engaging learning experience
- 🎓 Effective for language learning
- 👍 Variety of content and features
- 💡 Innovative learning approach

**What reviewers complain about**

- 💰 Expensive subscription
- 🐛 Buggy and unreliable app
- 🔍 Lack of transparency around pricing and cancellation
- 📱 Compatibility issues on mobile devices

**Reported bugs**

- App crashes frequently
- Subscription issues and unexpected charges
- Syncing and login problems
- Inconsistent performance across devices

**Requested features**

- Add more language options
- Improve user interface and navigation
- Provide better guidance and progression for learners
- Enhance audio and speech recognition capabilities


### Sentence Lab

[App page](https://appshunter.io/ios/app/sentence-lab/id6760779281)

Master Spanish sentence construction with this app. Practice translating English sentences into Spanish, receive instant feedback, and learn from detailed explanations. It uses spaced repetition and offers grammar guides and vocabulary flashcards.

**Highlights:** Translate English to Spanish sentences, Instant feedback and explanations, Spaced repetition learning, Grammar reference guides, Travel vocabulary flashcards, Detailed progress statistics, Offline practice support

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sentence Lab Monthly Subscription | $5.99 | per month |
| Sentence Lab Yearly Subscription | $49.99 | per year |


## Frequently asked questions

### Is FluentU free?

FluentU is free to download, with in-app purchases available.

### Is Sentence Lab free?

Sentence Lab is free to download, with in-app purchases available.

### Which has better reviews, FluentU or Sentence Lab?

FluentU is rated higher. FluentU averages 4.3 out of 5 from 2.8K ratings, while Sentence Lab averages 3.0 from 1 ratings.

### Do FluentU or Sentence Lab have ads?

Neither FluentU nor Sentence Lab shows ads.

### Which is updated more often, FluentU or Sentence Lab?

FluentU ships an update every 10 days, and Sentence Lab every 6 weeks. Most recently, FluentU was updated on November 11, 2026 and Sentence Lab 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.*