LangSim vs duzo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
LangSim
Practice German through realistic AI-powered conversations. Improve speaking, listening, and pronunciation with instant feedback and adaptive challenges. Master real-life scenarios from ordering food to job interviews.
- AI role-play for real conversations
- Instant speaking and grammar feedback
- CEFR-aligned progress tracking
- Smart vocabulary and grammar review
- Offline learning mode
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Already know some German? Time to speak faster and more confidently. LangSim is your AI-powered German language app for real conversations that help you speak German fast and naturally. Download LangSim today and start your first AI conversation in under a minute. Who it’s for: Learners at A2–B2 who want to move from grammar knowledge to fluent, real-life conversation. Why LangSim Works Real conversations, not drills – Practice ordering food, job interviews, apartment viewings, doctor visits, travel, meetings, small talk, and more. Each dialogue mirrors real-world German, helping you think, react, and speak naturally. AI role-play that adapts to you – Every character listens and responds to what you say. Conversations branch based on your responses, creating infinite ways to learn and replay scenarios. No two sessions are ever the same. Instant speaking feedback – Receive pronunciation analysis (IPA and phonetic tips) and real-time grammar correction with short, useful explanations that help you fix mistakes instantly. Improve rhythm, stress, and clarity with each sentence. CEFR-aligned progress – Track your A2 to B2 growth with clear goals, personalized lesson paths, and adaptive challenges that match your fluency level. LangSim automatically adjusts content to keep you in the perfect learning zone. Smart review that sticks – Spaced repetition ensures long-term retention of the vocabulary, idioms, and grammar patterns you actually use in conversation. Reinforce what matters most—not random words. Guided help, only when needed – Use built-in hints, translations, and model answers when stuck. Stay immersed in conversation without ever losing flow. What You’ll Practice * Speaking and listening in authentic German * Conversation strategies: asking, clarifying, confirming, repairing mistakes * Pronunciation and prosody for natural, confident speech * Grammar in context: word order, cases, verb frames, connectors * High-impact vocabulary for work, study, and daily life Popular Role-Plays * Restaurant and café: order, ask for changes, handle mistakes * Work and hiring: introductions, job interviews, meetings, feedback * Housing: apartment viewings, contracts, landlord chats * Health and travel: doctor visits, pharmacy, train station, airport * Social life: small talk, invitations, opinions, and casual talk Advanced Learning Tools * AI role-play companions with multiple conversation paths * Pronunciation feedback with IPA and phonetic guidance * Real-time grammar suggestions with bite-size explanations * CEFR progress tracking for A2–B2 learners * Smart review of words and grammar from your own dialogues * Contextual hints, quick translation, and adaptive help * Progress analytics to see your growth over time * Offline mode for uninterrupted learning LangSim isn’t just another language app—it’s your personal AI conversation world for mastering real German fluency. Feel confident in restaurants, meetings, interviews, or while traveling. Build real fluency, one role-play at a time. Stop memorizing. Start speaking. Speak German with AI role-play and discover how fast fluency can feel.
duzo
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Stop memorizing flashcards. Start actually speaking German. Duzo is an AI-powered German coach that talks to you like a real person — not a course. Chat with charismatic AI personas about real life, and get gentle, specific corrections after every message, the way a good friend would correct you: kindly, and only when it matters. WHAT'S INSIDE • AI Conversations — Talk with personas who have real personalities, jobs, and opinions. Practice everyday chats, roleplay tricky situations (ordering food, a job interview, an awkward apartment viewing), or dive into a topic of the day. • Real Corrections, Not Red Ink — Every message gets a kind, specific correction with a one-line explanation of the "why" — grammar, word choice, natural phrasing — without breaking the conversation's flow. • Voice Mode — Speak your German out loud and hear it back in natural, native-sounding AI voices. Build real speaking confidence, not just typing skills. • Blitz — A fast-paced translation game with a 10-step difficulty ladder that climbs and drops with you. • Lesen — 180+ original short stories across every level from A1 to C2, with instant tap-to-translate on any word. • Every CEFR Level, A1 to C2 — From your very first "guten Tag" to conversations sophisticated enough to sound native. Whether you're preparing for a move to Germany, keeping up with family, studying for an exam, or just tired of apps that never get you actually talking — Duzo is built to get you speaking German, not just tapping through lessons. Download Duzo. and have your first real German conversation today. Privacy Policy: https://nerzia.com/na/privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: LangSim at none against duzo's 3. LangSim also leads on iOS requirement (13.0 vs 17.0). On price, update cadence, ads and device support 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. duzo sells 3 in-app purchases, starting at $14.99 per month. LangSim asks for nothing beyond the download.
LangSim ships an update weekly, duzo every 10 days. The most recent releases landed on October 13, 2026 and October 25, 2026 respectively.
| Parameter | LangSim | duzo |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Weekly — better | Every 10 days |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 64 MB | 13 MB |
| Age rating | 4+ | 12+ |
| Developer | Betapilot | Khuslen Munbat |
In-app purchases
LangSim
No in-app purchases
duzo
- Monthly$14.991 Month
- 3 Months$34.993 Months
- Yearly3 Days trial$129.991 Year









