What's the most affordable mobile app builder for beginners?

Hey everyone, so i want to build a mobile app but my budget is pretty tight right now. I've been looking at some no code platforms and drag and drop builders but honestly there's so many options and the pricing is all over the place.

I have some basic coding knowledge (HTML/CSS) but never actually built an app before. Want to start with something simple for Android first and see how it goes.

What's the most affordable mobile app builder that's actually good for beginners? I don't need anything super fancy, just something that won't break the bank and has a decent learning curve. Would really appreciate any recommendations from people who've actually used these tools before

Thanks in advance