Busuu vs Duolingo vs Poliko: Which Language App Actually Works?

You’ve probably narrowed it down to Busuu vs Duolingo. Maybe you’ve tried one and it didn’t click. Or maybe you’re wondering if there’s a better language learning app out there that the algorithm hasn’t surfaced yet.

Here’s an honest breakdown of three popular options: Duolingo, Busuu, and Poliko. No fluff, no affiliate bias. Just what each app does well, where it falls short, and which one fits the way you actually want to learn.

Quick verdict: Duolingo is best for gamified vocabulary building. Busuu is best for community feedback and structured courses. Poliko is best for real speaking practice with AI conversations.

Duolingo: The Heavyweight

Duolingo needs no introduction. It’s the most downloaded language app in the world, and for good reason. The green owl has turned language learning into a game that millions of people actually stick with.

What it does well:

• Gamification that works. Streaks, leaderboards, XP, hearts. Duolingo understands motivation better than almost any education app. The dopamine loop keeps you coming back, and consistency is half the battle.
• Massive language selection. Over 40 languages, including less common ones like Hawaiian, Navajo, and High Valyrian. If you want to learn something obscure, Duolingo probably has it.
• Generous free tier. You can use Duolingo without paying a cent. Ads are the trade-off, but the core content is fully accessible.
• Polished experience. The app is fast, beautifully designed, and constantly updated.

Where it falls short:

• Speaking practice is surface-level. Duolingo’s speaking exercises ask you to repeat a sentence. That’s not a conversation. You’re reading aloud, not thinking in the language.
• No real AI conversations. Even with their newer AI features, interactions feel scripted rather than natural. You can’t go off-script and explore.
• Repetitive at higher levels. Once you’re past the beginner stage, the tap-and-match format starts to feel limiting. Advanced learners often hit a plateau where Duolingo can’t push them further.

Price: Free with ads. Super Duolingo costs $13-14/month and removes ads, adds unlimited hearts, and unlocks practice tests.

Busuu: The Community Pick

Busuu takes a different approach. Instead of gamifying everything, it leans into structured courses and community corrections from native speakers. Think of it as the classroom experience, reimagined for your phone.

What it does well:

• Native speaker corrections. Submit your writing or speaking exercises and real native speakers review them. This human feedback loop is genuinely valuable and something most apps skip entirely.
• Structured, CEFR-aligned courses. Busuu’s curriculum follows the Common European Framework, so you always know where you stand. The progression feels purposeful, not random.
• Offline mode. Download lessons for planes, commutes, or anywhere without Wi-Fi. A small feature, but a real one.
• Grammar explanations. Unlike apps that expect you to absorb grammar through osmosis, Busuu actually explains the rules when you need them.

Where it falls short:

• Speaking exercises are scripted. You record yourself saying a predefined phrase. It’s better than nothing, but it’s not a conversation. You never have to think on your feet.
• AI features feel basic. Busuu has added some AI-powered features, but they don’t fundamentally change the learning experience. The core is still traditional exercises.
• Pacing can feel slow. The structured approach is a strength for some learners, but others find it plodding. If you want to jump ahead, the linear progression can feel like a constraint.

Price: Free tier is limited. Premium runs about $14/month and unlocks full courses, grammar units, and offline access.

Poliko: The Speaking-First Contender

Poliko is the newest of the three, and it takes a fundamentally different approach. While Duolingo and Busuu build around reading and tapping, Poliko is a language transfer app built on voice-first AI conversations. You learn by actually speaking from your very first session.

What it does well:

• Real AI conversations from day one. No tapping, no matching, no multiple choice. You hold a button, speak, and an AI tutor responds naturally. It’s the closest thing to having a private tutor in your pocket.
• Personalized curriculum. Poliko generates a learning plan based on your level, goals, and the language you’re learning. Every session adapts to where you are, not where a generic syllabus thinks you should be.
• Natural grammar correction. Instead of red marks on a quiz, Poliko corrects your mistakes during conversation. The way a good tutor would: by gently rephrasing what you said correctly and explaining why.
• Real-time feedback. After each turn, you see what you said, what was correct, and what to improve. The feedback loop is immediate and contextual.
• Two practice modes. Tutor mode for guided lessons and Roleplay mode for real-world scenarios like ordering coffee or checking into a hotel.

Where it falls short:

• iOS only for now. Android is on the roadmap, but today it’s iPhone and iPad only.
• Smaller community. As a newer app, Poliko doesn’t have millions of users sharing tips and competing on leaderboards. The experience is more personal, less social.
• Fewer languages than Duolingo. Poliko supports 20+ languages, but it can’t match Duolingo’s 40+ catalog.

Price: 7 days full access free. Then from $8.33/month (billed yearly).

Download Poliko on the App Store

Feature Comparison Table

Feature	Duolingo	Busuu	Poliko
Core method	Gamified exercises	Structured courses	Voice-first AI conversations
Speaking practice	Read-aloud prompts	Scripted recordings	Free-form AI conversation
Grammar teaching	Implicit (learn by doing)	Explicit explanations	Corrected naturally in conversation
AI conversations	Limited, scripted	Basic	Full conversational AI
Human feedback	No	Native speaker corrections	No
Personalization	Adaptive difficulty	CEFR-based placement	AI-generated personal curriculum
Offline mode	Partial	Yes	No
Languages available	40+	14	20+
Free access	Full content with ads	Limited free tier	7 days full access free
Paid price	~$14/month	~$14/month	From $8.33/mo (yearly)
Best for	Vocabulary and habits	Structure and community	Speaking and fluency

Which Should You Pick?

The best app depends on how you learn and what you’re optimizing for.

Choose Duolingo if you need motivation above all else. The gamification is unmatched, and the free tier means there’s zero barrier to starting. If your biggest challenge is consistency, Duolingo’s streaks and rewards solve that problem better than anyone.

Choose Busuu if you want structure and human feedback. The CEFR-aligned curriculum gives you a clear path, and native speaker corrections add a layer of authenticity that AI can’t fully replicate. If you’re the kind of learner who wants to know exactly where you are on the path to B2, Busuu delivers.

Choose Poliko if your goal is to actually speak the language. If you’ve done the flashcard grind and still freeze in real conversations, Poliko addresses that gap directly. The voice-first approach means every minute you spend in the app is a minute spent producing language, not just consuming it.

The honest truth: if you can’t hold a basic conversation after months of studying, your app might be teaching you the wrong skill. Reading and speaking are different abilities. Train the one you actually want.

Can You Use Multiple Apps?

Absolutely. In fact, combining apps is one of the smartest moves you can make.

A strong combination: use Duolingo for vocabulary and daily habit-building, and Poliko for speaking practice. Duolingo gives you the words. Poliko teaches you to use them in real time. Busuu can slot in as a weekend study tool for grammar deep-dives and writing corrections.

The apps aren’t really competitors in the way you might think. They each train a different part of your language ability. The best language learning app isn’t a single app. It’s the combination that covers all your bases: reading, writing, listening, and most importantly, speaking.

Whatever you choose, the key is the same: start today, practice daily, and don’t wait until you feel “ready” to open your mouth. You’ll never feel ready. You just have to start.

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• Duolingo Alternative: 5 Apps That Actually Teach You to Speak
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• The Shadowing Technique: How to Finally Sound Natural in Spanish