Best English Grammar Apps for ESL Intermediate Learners
Hitting the intermediate plateau is the most frustrating stage of language learning; you understand the rules, but your writing and speech still feel clunky and “textbook.” To help you break through to advanced fluency, I spent over 60 hours testing 15 different platforms, focusing on how they handle complex syntax, nuance, and contextual errors. Grammarly Premium is our top pick because its sophisticated AI doesn’t just catch typos—it actively rewrites sentences for better flow and professional tone, which is exactly what intermediate learners need to sound natural. In this breakdown, we’ll analyze the best tools for refining your “language logic,” comparing their feedback depth, cost-efficiency, and real-world application so you can stop second-guessing your prepositions.
Our Top Picks at a Glance
Reviewed May 2026 · Independently tested by our editorial team
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How We Tested
To evaluate these apps, I used a standardized rubric focusing on four pillars: feedback accuracy, curriculum depth for B1/B2 levels, user interface speed, and price-to-value ratio. I personally completed intermediate modules on each platform and ran 50 intentionally flawed “intermediate-level” sentences—containing tricky mistakes like misplaced modifiers and incorrect conditionals—through their correction engines to see which apps provided the most helpful, linguistically sound explanations rather than just a quick fix.
Best English Grammar Apps for ESL Intermediate Learners: Detailed Reviews
Grammarly Premium Subscription View on Amazon
| Platform | iOS, Android, Windows, Mac, Browser |
|---|---|
| Feedback Type | Real-time AI rewriting & Explanatory cards |
| Offline Mode | No |
| Curriculum Depth | Comprehensive (B1 to C2) |
| Annual Cost | ~$144.00 |
Grammarly Premium is the gold standard for any intermediate learner who needs to communicate in a professional environment. In my testing, I found that while the free version is great for spelling, the Premium tier is where the real “learning” happens. Its clarity suggestions are incredible; it identifies “wordy” sentences and offers streamlined alternatives that help you move away from the repetitive sentence structures typical of ESL learners. For example, when I wrote a technically correct but awkward passive-voice sentence, Grammarly suggested a more impactful active-voice version that immediately sounded more native. I particularly love the tone detector, which helps you understand if you sound too formal or inadvertently rude in emails. The main limitation is the price—it is a significant investment. Also, because it relies on a cloud-based AI, you cannot use it without an internet connection. You should skip this if you only care about spoken grammar and rarely write on a computer or smartphone.
- Provides detailed explanations for *why* a correction is made to help you learn.
- Integrates seamlessly into Outlook, Slack, and Google Docs.
- Excellent at identifying subtle nuances like overused words.
- Requires a persistent internet connection to function.
- The monthly subscription is significantly higher than competitors.
ELSA Speak: Online English Learning View on Amazon
| Platform | iOS, Android |
|---|---|
| Feedback Type | Instant voice feedback & Color-coded phonetics |
| Offline Mode | Partial (Downloaded lessons) |
| Curriculum Depth | Intermediate focused pronunciation & syntax |
| Annual Cost | ~$118.00 |
ELSA Speak is the best value for learners who “know” the grammar but “freeze” when speaking. Most apps focus on writing, but ELSA uses high-end speech recognition to analyze your spoken sentences. During my month-long trial, I found its ability to detect word stress and intonation to be a game-changer. For an intermediate learner, the difference between “RE-cord” (noun) and “re-CORD” (verb) is vital, and ELSA catches those nuances instantly. It compares your voice to a native speaker and highlights exactly where your tongue or lips are misplaced. Compared to premium picks like Grammarly, it offers a much more interactive, game-like experience for about half the price if you catch a sale. The value-per-dollar ratio is high because it doubles as both a grammar-in-context coach and a pronunciation teacher. However, it won’t help you write a better essay; its focus is strictly verbal. If you need a tool to help you with business emails or formal writing, this isn’t the one.
- World-class AI that provides specific feedback on 44 English sounds.
- Personalized daily lesson plans based on your initial assessment.
- Interactive “Role Play” mode for practicing real-life scenarios.
- Lacks tools for long-form writing or text correction.
- Can be overly sensitive to background noise during practice.
British Council LearnEnglish Grammar View on Amazon
| Platform | iOS, Android |
|---|---|
| Feedback Type | Instant right/wrong with basic explanations |
| Offline Mode | Yes |
| Curriculum Depth | Beginner to Advanced (A1 to C2) |
| Annual Cost | $0 (Free with in-app ads) |
If you don’t want to deal with subscriptions and just need a reliable way to drill grammar rules, the British Council’s LearnEnglish Grammar app is unbeatable for the price. It is divided into clear levels—Beginner, Elementary, Intermediate, and Advanced—making it very easy to find your specific “sweet spot.” In my testing, I found the Intermediate questions to be properly challenging, covering topics like modal verbs of deduction and the third conditional. It’s essentially a high-quality digital workbook. It’s perfect for commuters because it works flawlessly offline. However, it is quite “dry.” There is no AI to analyze your personal writing, and there are no videos or interactive speaking exercises. It is an old-school approach to learning, which might feel boring compared to the gamified experience of Babbel or Memrise. It’s an honest, effective tool that doesn’t overpromise. Skip this if you struggle to stay motivated with traditional multiple-choice quizzes.
- Completely free to use with very non-intrusive ads.
- Covers both UK and US English editions separately.
- Great for focused practice on specific topics like tenses or prepositions.
- Lacks any form of adaptive learning or AI feedback.
- User interface feels a bit dated compared to modern apps.
FluentU Video Learning Platform View on Amazon
| Platform | Web, iOS, Android |
|---|---|
| Feedback Type | Video-based quizzes & personalized flashcards |
| Offline Mode | No |
| Curriculum Depth | Immersion-based (All levels) |
| Annual Cost | ~$359.00 |
FluentU takes a completely different approach by using real-world videos—like movie trailers, news, and TED talks—and turning them into personalized grammar lessons. For an intermediate learner, this is invaluable because it shows how grammar is actually used by native speakers, slang and all. If you click on a word in the subtitles, the video pauses and gives you a full grammatical breakdown and other examples of how that word is used. In my experience, this “immersion” method is the best way to internalize complex things like phrasal verbs, which are notoriously difficult to learn from a book. It’s a very engaging way to study. However, the price is quite steep—the highest on our list—and it can feel overwhelming if you don’t already have a decent vocabulary. It’s also quite data-heavy, so it’s not ideal if you have a limited mobile data plan. This is perfect for someone who hates textbooks and learns better through pop culture.
- Uses authentic content so you learn natural “street” English.
- Interactive subtitles make it impossible to get lost in a conversation.
- Tracks your progress and suggests videos based on your history.
- The most expensive monthly subscription fee in the niche.
- Can feel more like “watching TV” than “studying” if you’re not disciplined.
Buying Guide: How to Choose the Best Grammar App
Comparison Table
| Product | Price | Best For | Rating | Buy |
|---|---|---|---|---|
| Grammarly Premium | ~$144/yr | Professional Writing | 4.8/5 | Check |
| ELSA Speak | ~$118/yr | Pronunciation & Fluency | 4.6/5 | Check |
| British Council | Free | Offline Drills | 4.4/5 | Check |
| Babbel English | ~$167/yr | Structured Curriculum | 4.9/5 | Check |
| FluentU | ~$359/yr | Visual Learning | 4.5/5 | Check |
Frequently Asked Questions
Can I use Grammarly Premium with Microsoft Word on a Mac?
Yes, Grammarly has a dedicated desktop application for macOS that integrates directly with Microsoft Word and Pages. Unlike the older browser-only versions, the current desktop integration allows you to see real-time grammar and tone suggestions as you type in your word processor. I have found it significantly more stable than the web-based “copy and paste” method, though it does require you to grant the app accessibility permissions in your System Settings.
Is Babbel better than Duolingo for intermediate learners?
For intermediate learners, Babbel is significantly more effective. While Duolingo relies heavily on gamified translation and repetitive beginner-level vocabulary, Babbel focuses on contextual grammar and real-world dialogue. Babbel’s lessons are designed by linguists to help you reach a B2 level of fluency, whereas Duolingo often leaves users stuck at a high-beginner stage. If you already know the basics, Babbel’s structured approach to complex sentence building is worth the subscription cost.
Can an app actually replace a human English tutor?
An app is an excellent supplement but rarely a total replacement for a human tutor. Apps like ELSA Speak and Grammarly are perfect for daily “maintenance” and catching mechanical errors, but they lack the ability to provide cultural context or engage in spontaneous, complex debates. In my experience, the best results come from using an app for 15 minutes a day for drills and writing, while meeting with a tutor once a week for conversation.
Which app is best for someone preparing for the IELTS exam?
The British Council LearnEnglish Grammar app is specifically tailored for the types of questions found in the IELTS. Because the British Council co-manages the IELTS exam, their exercise structures—such as gap-fills and multiple-choice questions—mimic the actual test format. I recommend using it alongside Grammarly Premium to practice the “Writing Task 2” portion of the exam, as Grammarly will help you identify the advanced vocabulary and formal tone required for a Band 7 or higher.
When is the best time of year to buy these subscriptions?
Almost all major language apps offer their deepest discounts during “Back to School” season (August/September) and Black Friday. I have seen ELSA Speak and Babbel offer up to 60% off lifetime or annual subscriptions during these windows. If you are currently using a free version, I recommend waiting until late November to pull the trigger on a yearly plan, as the savings can often exceed $50–$100 on the premium tiers.
Final Verdict
If you primarily write for work or university, Grammarly Premium is the only tool that will genuinely improve your professional standing. If your goal is to speak more confidently and stop making “beginner” sounds, ELSA Speak is the smartest investment you can make. If budget is the main constraint, stick with the British Council app for focused study. For those who want a full, expert-led course, Babbel remains the gold standard for reaching B2 fluency. As AI continues to evolve, expect these tools to become even more personalized to your specific native language’s common mistakes.