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Compare language-learning apps

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App	Mondly	Duolingo
Overall score	74	88
Tagline	41 languages, from any of 33	The habit machine
Best for	Travel-ready basicsFamily conversation	Travel-ready basicsFamily conversation
Use-case fit	7	6
Level fit & AI tutor	Beginner Intermediate Fluent AI tutor	Beginner Intermediate Fluent AI tutor
Verdict	Buy it for breadth, not depth: excellent as a first month in an unusual language, or if you want to study from a native language other than English.	The best place to start and the worst place to finish. Use it to build a daily habit and a first thousand words, then graduate to something with real conversation.
Pros	41 target languages taught from 33 source languages Lifetime plan is inexpensive for the coverage Chatbot and speech recognition included at the base tier	Free tier is genuinely usable — no other app comes close Streaks and daily goals build the habit that actually drives progress Max adds AI roleplay and per-answer explanations
Cons	Course depth is shallow — mostly A1–A2 Translations in smaller courses can be clumsy Repetitive exercise types	Weak above intermediate — courses thin out fast at B2+ Sentences can be artificial and rarely teach connected speech Grammar is inferred rather than taught unless you pay for Max
Full review	Read review →	Read review →

Quick takeaway

Mondly leads this comparison with an overall score of 74. It is strongest for Travel-ready basics and Family conversation. Duolingo is the closest alternative at 88. Choose Mondly if 41 target languages taught from 33 source languages; pick Duolingo if free tier is genuinely usable — no other app comes close.