I miss my android. I can't download this app on my iphone because it's no longer available. I just…

I miss my android. I can't download this app on my iphone because it's no longer available. I just don't care for the iphone at all. I had an upgrade and got it and I hate that it doesn't have a back button. It's really difficult. I should have gotten a flip phone like I said I would. My husband encouraged me to get the iphone.