Language apps (taalapps) have multiplied dramatically. For Dutch, the main options: Duolingo (gratis — free, gamified, good for beginners to A2, vocabulary exposure and light grammar, fun but limited for serious progress beyond B1). Babbel (betaald — paid, more structured grammar, adult-focused, clearer progression than Duolingo, good for A1-B1). Pimsleur (paid, audio-only focus, good for pronunciation and spoken patterns, less vocabulary breadth).
More specialised apps: Anki (free, spaced repetition flashcards, most powerful vocabulary tool but requires self-setup or pre-made decks). Clozemaster (free and paid, fill-in-the-blank with real Dutch sentences, excellent for intermediate-advanced vocabulary in context). LingQ (paid, import any Dutch content and look up words in context, great for extensive reading and listening). HelloTalk and Tandem (free with premium, language exchange with native speakers, speaking practice). Speechling (pronunciation feedback with human coaches).
Recommended combination: Anki (daily vocabulary review, 10-15 min) + one structured app (Babbel for grammar) + authentic content (podcasts, YouTube, news). Apps alone will not take you to fluency — they are vocabulary and pattern-building tools. The speaking, listening, and reading skills require authentic Dutch content and real conversation practice beyond any app. Use apps to build the scaffolding, then fill it in with real Dutch experiences. The best app is the one you actually use daily — consistency beats feature richness.