It’s available on the App Store. Like I said, I’ve used it side loaded for years. No ads, no data collection. What you have to be careful on is downloading roms, but I’ve downloaded roms onto my iPhone 100’s of times over the last 10 years and never had any issue. Just Google “pokemon gold rom” or whatever game you’re looking for and make sure you hit the right download button. Apple is pretty good about not allowing viruses in though.