I have a .ipa file in my laptop and also have a Apple Laptop with MacOS. I do not have any iPhone. I want to run the app in my Laptop. Doing a quick Google Search brought me this., which looks like costing $99 for each year. I just want to run the app for free, what should I do?
You cannot run iOS applications on anything other than iOS. And you need a device capable of running iOS (iPhone or iPad).
The reason being is that iOS applications are compiled to run on the ARM-based processor. OS X (and most desktop or notebook operating systems) run on the i386 or x64 architecture.
To run a different arch-type, you'd need an emulator. And all Xcode has is a simulator.