> I’m using AI to assist me and I’m building an app<p>Vibe coding is a myth, it will take you only so far and will require manual fixes and refactoring before MVP. Learn the basics of and keep learning, say, Swift. <a href="https://developer.apple.com/swift-playground/" rel="nofollow">https://developer.apple.com/swift-playground/</a><p>> Should I actually use a completely blank iPhone for this instead?<p>Does not make any difference. Every app runs in its own separate environment. Only iOS device "Language and Region" settings affect all apps on a device.<p>> should I use a more updated version of the iPhone?<p>Does not make much difference, unless you need to target some new capabilities introduced with a particular iOS version. Other than that, the rest of the API is the same across multiple recent iOS versions.<p>> Should I just run a simulator on my actual computer<p>Sure. It is easier and faster to test on a Simulator using a mouse rather than on a device, tapping. Once you stabilize some code under the Simulator, always re-test it on a real device.<p>> I don’t want to share my idea with others<p>This will come as a shock, but ideas themselves are nearly worthless. There has been a previous Facebook, a previous Twitter, a previous Office, etc. that has failed. It is only the quality of execution of an idea, the quality of the Product-Market-Fit and the quality of marketing of a product that makes a product a winner. Start by reading books by Rob Walling, e.g., "Start Small, Stay Small".