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Honestly, I've been using Duolingo for years and it does the job for the basics, but if you really want to make progress you can't rely on it alone. Babbel's pretty good too, I'd say it's more structured than Duolingo. But it all depends on your level and how much time you can dedicate to it, though most people I know combine an app with actual content like podcasts or Spanish YouTube videos so it actually sticks.
Duolingo and Babbel still dominate the market in 2026, but honestly it really depends on your learning style - if you just want quick, gamified stuff, Duolingo's pretty decent, but if you're looking for something more structured with actual teachers, Babbel or Busuu are better.
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