How do I make an iOS application without Mac and Xcode?

So, I have an iPhone and no mac. I want to make a simple application that needs to be able to check if the phone is locked/unlocked or the screen is on/off, even if the app is killed / in background. Also, I need to schedule events / notifications daily.

I could possibly use hackintosh, but it's illegal and I don't want to mess with Xcode. So, I can't use React Native or Expo. I can't use Ionic because I need Xcode to build the app anyway. Seems like PWAs (installable home web apps) can't provide features I want (background, check lock/display state) hat are my options if any? Am I stuck and I just need to buy Mac or Android phone?