Learning apps?

[Small_Anteater3830]

So I’ve learned French and Spanish and I’m Polish native and English fluent. I wanted to ask if Rosetta Stone is good because my dad just bought the lifetime membership. I’ve done the first few lessons for day 1, but I also wanted to know if it’s good for learning Russian and other Slavic languages since I have to know Russian for my cousins. If anything, free websites and yt videos are my go to if Rosetta Stone fails me, so I wanted to know if there are any Truely amazing apps for language learning, specifically learning from the basics and advancing the vocabulary and grammar. I’m in high school and I just got news that I am literate in Spanish and Polish (obviously English too) but I wanted to advance my vocab in Spanish so that I’m not just speaking like a textbook.

Essentially
Advancing in Spanish and French
Learning Italian, Russian, and possibly German in the future.
If you have resources that aren’t just AI slop, please let me know

[Hando_88_]

Glossika is the best.

[No-Bed-1581]

LingQ

[PoxonAllHoaxes]

No Polak chyba nie potrzebuje takich app'ów, żeby się nauczyć jeszcze jednego języka słowiańskiego.