Superfluent vs Sentence Lab
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Superfluent
Practice real-world conversations with an AI tutor for just 5 minutes a day. Get instant feedback on your speaking, grammar, and pronunciation to build confidence and fluency. Explore culture while learning languages like Spanish, French, and English.
- Real-world conversation practice
- AI tutor feedback
- Grammar and pronunciation correction
- Cultural exploration
- Progress tracking
- Streak import
- Short daily sessions
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Real world speaking practice, just 5 minutes a day. Practice hundreds of real conversations and get helpful feedback from your personal AI tutor on every reply. Named one of TIME Magazine's Best Inventions of the Year and one of The New York Times' Best Language Learning Apps. Superfluent is the language learning app that actually works. No flashcard drills: you speak from day one, in the real moments you'll face when you travel, move abroad or meet your partner's family. No fear, no stress. Make your mistakes here, not in front of a waiter. SPEAK IN REAL CONVERSATIONS: Order a drink, ask for directions, go on a date, call your mother-in-law. Hundreds of real-world conversations, set in the places the language is actually lived. LEARN FROM YOUR MISTAKES: Your personal AI tutor gives instant, helpful feedback on every reply, so you fix your grammar, phrasing and pronunciation as you go. EXPLORE THE CULTURE: Follow curated routes or roam the map in Paris, Berlin, Barcelona and more, and pick up the culture along with the language. STAY MOTIVATED AND TRACK YOUR PROGRESS: Watch your Fluency Report grow, see your speaking speed improve, and fill in the map as you finish each route. BRING YOUR STREAK: Already learning somewhere else? Import your streak and graduate from basic vocab to real conversations. JUST 5 MINUTES A DAY: Short sessions that fit any day and build real confidence fast. Download the app for free today and practice speaking any of the following languages: Spanish (Mexico and Spain), English (England and the USA), French, German, Italian, Portuguese (Brazil and Portugal), and more languages will be coming soon. You can upgrade to Superfluent Pro or stick with the free version of the app instead. It's up to you. Either way, we're here to help you reach your fluency goals. ---------------- Superfluent Pro Subscription: By subscribing to Superfluent Pro, you'll have unlimited access to all Superfluent content. We have monthly and annual plans for the Superfluent Pro subscription. We also offer a Family Plan subscription if you want to share Superfluent Pro with up to 5 other people. Your Apple account will be charged for payment when you confirm the start of your subscription. The subscription will automatically renew unless canceled at least 24 hours before the end of the current billing cycle. You can cancel the renewal at any time by going to the settings in your Apple account. Terms of Service: https://superfluent.com/terms Privacy Policy: https://superfluent.com/privacy
Sentence Lab
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.
- Translate English to Spanish sentences
- Instant feedback and explanations
- Spaced repetition learning
- Grammar reference guides
- Travel vocabulary flashcards
- Detailed progress statistics
- Offline practice support
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Sentence Lab helps you build real Spanish fluency by practicing complete sentences, not just flashcards. HOW IT WORKS • See an English sentence • Type the Spanish translation • Get instant feedback • Learn from your mistakes with helpful explanations SMART LEARNING Sentence Lab uses spaced repetition to optimize your learning. Sentences you struggle with appear more often, while mastered content is spaced out for efficient long-term retention. FEATURES • 1,500+ carefully crafted sentences from A1 to C1 level • Spaced repetition that adapts to your progress • Grammar reference guides • Travel vocabulary reference and flashcards • Detailed statistics to track your improvement • Daily streak to keep you motivated • Accent keyboard for easy Spanish character input • Easy mode with word bank for beginners • Custom content creation for premium users • Scenario conversations for premium users • Offline practice support PRACTICE MODES • New Sentences - Learn fresh content • Review - Practice sentences due for review • Mixed - A balanced variety • Weak Areas - Focus on challenging sentences • My Content - Create your own custom content to practice Build real Spanish fluency, one sentence at a time.
Screenshots
Verdict
The clearest difference is rating: Superfluent at 4.9 against Sentence Lab's 3.0. Superfluent also leads on update cadence (every 6 days vs every 6 weeks) and ratings volume (4K vs 1). On price, ads, in-app purchases and monetization model 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. Superfluent sells 10 in-app purchases, starting at $10.99 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.
Superfluent holds the better App Store score, 4.9 against 3.0. That said, the two scores are not equally well evidenced: Superfluent has 4K ratings behind it against 1, so its average is the more settled of the two.
Superfluent ships an update every 6 days, Sentence Lab every 6 weeks. The most recent releases landed on November 11, 2026 and October 31, 2026 respectively.
| Parameter | Superfluent | Sentence Lab |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (4K ratings) — better | 3.0 (1 ratings) |
| Positive reviews | 92.9% of reviews | — |
| Number of ratings | 4K — better | 1 |
| Update frequency | Every 6 days — better | Every 6 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | #185 — better | — |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 16.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 103 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | Superfluent, Inc. | JEFFREY ROBERT SANCHEZ |
Bugs and requests
Superfluent
Reported bugs
1 issue- Volume issue when trying to pronounce individual words
Requested features
2 requests- Ability to turn off text display and focus on listening
- Option to review past conversation scenarios
Sentence Lab
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Superfluent
- Monthly$10.991 Month
- Monthly$14.991 Month
- Monthly$19.991 Month
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- Annual$74.991 Year
- Annual7 Days trial$74.991 Year
- Annual7 Days trial$89.991 Year
- Annual3 Days trial$99.991 Year
- Annual7 Days trial$99.991 Year
- Annual7 Days trial$119.991 Year
- Family Plan7 Days trial$149.991 Year
Sentence Lab
- Sentence Lab Monthly Subscription$5.991 Month
- Sentence Lab Yearly Subscription$49.991 Year








