hi there, I'm new here and sorry in advanced if i'm asking questions seem silly to you. I'm planning to build an app where it support IOS and Andriod, and I already designed one online and connect it to shopify where I have a trial account there too. I'm little confused about paying to Shopify and the other site too. So, my question can I build the app as I designed it and pay for the cost and that's it. then I can have the apps, so I can upload it with my developer account on Apple Store and Google Play . where I can pay for all that just one time and forget about it. And focusing on Shopify where I can update my products and paying for them yearly.
I hope I was clear with my question as English is not my 1st language and I have low budget to start with ;) Thankfully. Hamad