Hey that is great you are building this.
For apple you will need appstore access and that registration will take some time is my experience. You will most probs need a legal entity for that too, somewhere registered. (Can be sole propietorship). Google was always easier to onboard developer but IIRC you would need the same kind of registration. That said both platforms require a fee: Google a one time 25 USD and Apple a yearly membership of 99 USD.

Don't let the Apple Appstore review process turn you off! Alternative, considere a PWA to launch at first if you have a web based app (not sure if you are building native).

Best of luck Meno and looking fwd to the app.