Ummm IOS is more hardware oriented, well smooth functioning with heavy games, well paid field for developers, however, On the other hand, android has it's own advantages like pocket friendly, more customizable, easy installations of third party apps. But let me tell you that, AiToolsKit.ai (Productive AI, Seo, Writing & Social media Tools platform) is mobile friendly to both IOS and Android. You can check it's mobile friendlyness score using "Mobile friendly test tool" available on AiToolsKit.ai only.
PH Link: https://bit.ly/ph-product
Definitely iOS. The multiple Apple products provide me with lots of conveniences that I have gotten used to and at this point I can't imagine changing.