So it's just an Android app and not a website? One of my great frustrations with current platforms is that they're just apps. The UX is terrible: I'm stuck on a tiny screen, I can't search (control+f) and have to scroll through endless lists, I can't copy text (e.g. Google translate), etc. Even though delivery is ridiculously cheap where I currently live (Indonesia), I find I use it a lot less than back home in Europ…
We will be adding a PWA and IOS app. Its not so much difficult to build it ... We just need some funds and Investment ! and copy the screens already in the android app. In lot of developing countries android is dominant platform so we though we would start with android.
I would, however, suggest you clarify your intent to reach other platforms in your communication. E.g. "iPhone app planned. Subscribe to our newsletter to be the first to learn when we have an app for your iPhone" or so. That way you show interested people that it is on your radar, you have plans, but simply not the resources (yet).