Duolingo

Duolingo makes language learning accessible with short, game-like lessons designed for mobile-first learning. You can study 30+ languages from English, including Spanish, French, Mandarin, Japanese, and many others. The app uses spaced repetition and streak mechanics to build daily habits without feeling like formal, boring study sessions.

Works well if you want to start a new language with minimal time commitment and immediate feedback from each lesson. The free version is fully functional and genuinely complete, though premium removes ads and opens a few extra features like offline access. It's lighter on grammar explanation than academic platforms but stronger for vocabulary building and conversational listening practice.