Hello! Someone I know is interested in learning Korean. They have started using Duolingo, but I'm not sure that will work. I know that there isn't really anything like Renshuu for other languages without a paywall, but if you know of any free/easy-to-use apps or websites please let me know. Thank you!
I would say that teuida would be good to have alongside other apps/ websites. It is good for vocal practice, and while it won't take you to near fluency (from what I know at least), it is a great place to start out or just use to strengthen your overall knowledge of korean. I will add that a lot the extra benefits require the premium version, but it isnt really all that necessary imo. Hope this helps you, and good luck to your friend!!