[LluisGerard]

I was also thinking about creating a stock screener but don't know where to get market data. Where do you get yours? Thank you!

I think your app could be better with some UX/UI re-thinking.

[yvsong]

For commercial apps one needs to buy data. Personal projects can use free data from some websites. I have ideas (and others' suggestions) to improve the UI of the app, but decided to pursue other directions.