I know a lot of people love language learning apps, but I'd argue for a different approach: Don't use them at all. I like learning languages a lot, and focus on fluency in one language at a time over learning just the basics in many (nothing wrong with that, just not my approach). And what really works for me has always been a mixture of textbooks, dedicated vocab studying and tons of immersion. Language learning apps are fun, but they don't make you do the boring, hard work that actually sees results.
From my own experience: I know many people who have years-long streaks on DuoLingo and others, but actually speak very little of their target language. Meanwhile I've never used a language for learning Korean (Self-taught. I've been at it for nearly 5 years now) and I can speak to my Korean friends for hours while only having to look up words very occasionally or having them explained to me in Korean.
By all means, use Babbel or another European alternative if you are going to use them. But maybe also consider changing your approach, you might see much better results.