The Core Difference
These three apps are built on fundamentally different ideas about how people learn languages:
- Duolingo believes in gamified repetition. Learn words through translation, build a streak, compete on leaderboards.
- Speak believes in immersion through AI conversation. Jump into roleplay scenarios and learn by doing.
- Lingrow believes in structured teaching followed by open practice. Learn the concepts first, then use them in conversation, then review detailed feedback.
None of these approaches is wrong. But they produce different results at different speeds.
Speaking Practice
This is where the biggest differences show up.
Duolingo is a reading and translation app at its core. You spend most of your time tapping words into order, matching translations, and typing sentences. The AI speaking features (Video Call and Roleplay) exist on the most expensive tier, but they're only available for Spanish, French, German, Italian, and Portuguese. If you're learning Korean, Japanese, Chinese, or most other languages, there's almost no speaking practice.
Speak puts conversation at the center. You get roleplay scenarios, free conversation mode, and speaking drills. From your first session, you're talking out loud. The speech recognition is accurate and the AI voices sound natural. There's a structured curriculum that builds speaking skills progressively.
Lingrow also centers on speaking but adds a layer that Speak doesn't have: guided lessons. Before conversation practice, an AI tutor walks you through vocabulary and grammar on an interactive whiteboard. You learn the building blocks, then immediately use them in a mini roleplay. After that, 350+ open conversation scenarios let you practice freely. You're speaking from session one, but with structure behind it.
Winner: Lingrow. The combination of guided teaching and open conversation gives you more types of speaking practice. Speak is a close second. Duolingo is a distant third.
Feedback Quality
This is the factor that determines how fast you actually improve.
Duolingo gives minimal feedback. If you get something wrong, it shows the correct answer. There's no explanation of why you were wrong, no pronunciation correction, and no personalized tips. You learn by pattern matching over repetition.
Speak provides feedback during and after conversations, but it's brief. Even on the most expensive plan, post-conversation analysis lacks the depth needed to target specific weaknesses. You get a general sense of how you did, but not a clear picture of what to work on.
Lingrow goes the deepest. During conversations, you get real-time correction on pronunciation and grammar. After each conversation, you get a full breakdown covering grammar accuracy, vocabulary usage, fluency, and pronunciation, along with specific tips on what to improve. The AI also tracks patterns across sessions, so the feedback gets more targeted over time.
Winner: Lingrow. The gap in feedback quality is the single biggest differentiator between these three apps.
Language Support
Duolingo: 40+ languages for the core course. AI features for about 5-6 languages.
Speak: 6 languages (English, Korean, Japanese, Spanish, French, Italian).
Lingrow: 15 languages (including Korean, Japanese, Chinese, Spanish, French, German, Italian, Portuguese, and more).
Winner: Depends. Duolingo wins on raw language count. But if you care about AI speaking practice, Lingrow supports the most languages with full feature depth. Speak is the most limited.
Structured Learning
Duolingo has the most structured path. Courses are divided into units and lessons that progress in a set order. The structure is clear, but it's mostly vocabulary and translation, not speaking.
Speak has a structured curriculum with speaking lessons that build on each other. The progression works well for beginners but gets repetitive at intermediate levels.
Lingrow has 100+ guided lessons per language with an AI tutor. Each lesson covers specific grammar and vocabulary, then ends with a practical roleplay. On top of that, the 350+ conversation scenarios are organized by topic, difficulty, and situation type. You get both structured teaching and open-ended practice.
Winner: Lingrow for speaking-focused structure. Duolingo for gamified vocabulary structure.
Content Depth and Variety
Duolingo: Extensive vocabulary courses, stories, and listening exercises. AI features are thin. Content is broad but shallow on speaking.
Speak: Good variety of scenario types for beginners. Gets repetitive at intermediate and advanced levels. Limited to 6 languages.
Lingrow: 350+ conversation scenarios covering travel, work, social situations, dating, daily life, and more. 100+ guided lessons. Content depth holds up through intermediate and advanced levels.
Winner: Lingrow for speaking content. Duolingo for vocabulary breadth.
Pricing
Duolingo: Free tier with ads and limited lives. Super Duolingo removes ads and adds hearts. Max tier (most expensive) adds AI features. Annual pricing makes it one of the most expensive apps when you want the full experience.
Speak: Multiple paid tiers. No free tier. Mid-to-high range pricing.
Lingrow: Single paid subscription. No free tier. Competitive pricing.
All three apps are significantly cheaper than private tutoring, which typically runs $20-50+ per hour.
Winner: Duolingo if you only want the free tier. For paid features, pricing is competitive across all three. Lingrow and Speak both offer more speaking practice per dollar than Duolingo's premium tier.
Platform Availability
Duolingo: iOS, Android, Web.
Speak: iOS, Android.
Lingrow: iOS only.
Winner: Duolingo for availability. Lingrow is the most limited here, though iOS covers a large portion of language learners.
Head-to-Head Comparison
| Feature | Duolingo | Speak | Lingrow |
|---|---|---|---|
| Primary method | Translation & gamification | AI conversation | Guided lessons + conversation |
| Speaking practice | Minimal (Max tier only) | Core feature | Core feature |
| Feedback depth | Minimal | Brief | Detailed & personalized |
| Guided lessons | Translation-based | Speaking drills | AI tutor + whiteboard + roleplay |
| Conversation scenarios | 5-6 languages only | Moderate variety | 350+ scenarios |
| Languages | 40+ (AI for ~6) | 6 | 15 |
| Free tier | Yes | No | No |
| Platforms | iOS, Android, Web | iOS, Android | iOS |
| Best for | Vocabulary & habit building | Beginner speaking | Speaking with deep feedback |
Which Should You Choose?
Choose Duolingo if:
- You want a free starting point for vocabulary
- Gamification (streaks, leaderboards, XP) motivates you
- You're learning one of the 5-6 languages with AI features and want a familiar platform
- You want to learn to read before you learn to speak
Choose Speak if:
- You want to jump straight into speaking practice
- You're learning Korean, Japanese, or Spanish
- You prefer natural-sounding AI voices
- You don't need detailed post-conversation feedback
Choose Lingrow if:
- Your priority is speaking with real feedback on how to improve
- You want structured lessons that teach you before throwing you into conversation
- You want the deepest post-conversation analysis available
- You're learning any of the 15 supported languages
- You care about improving fast, not just practicing
For many learners, the best setup is actually a combination. Duolingo for casual vocabulary review, and Lingrow for serious speaking practice. But if you only want one app and your goal is conversation, Lingrow gives you the most complete path from structured learning to confident speaking.
Looking for more options? See the full best AI language learning apps ranking or language-specific guides for Korean, Japanese, and Spanish. Korean learners can also take the free Korean level test to figure out which difficulty level to start at.