Wait, you had a device that runs a key piece of software for you, and you replaced it with one that doesn't run that key application? Why?
A very old, yet still quite true, adage is, buy the software that does the necessary task, then buy the OS that the software requires to run, then buy the hardware that the OS requires to run. (In the iOS case, of course, the latter two parts are combined.)
Since iOS is a proprietary system, an emulator of any sort for it on a PC is undoubtedly going to involve breaking a lot of license agreements. You can't buy a separate copy of iOS, it is licensed only for running on Apple hardware.
This thread, on the Pythonista forum, might be more well received if it were titled, "Pythonista alternatives for Android".
Your best bet might be an iPod touch or an iPad. If money is a concern, it doesn't have to be the latest gen to meet the requirements; secondhand or a refurb from Apple are worth considering.
FWIW, I've used Kivy quite extensively, on the Raspberry Pi. It's a good UI library, but it has nothing equivalent to Pythonista's IDE, and while you can definitely use it to write apps for Android, I'm not at all sure you can write them on Android.