Garmin StreetPilot Onboard With Apple iPad And iPhone

One of the reasons that I bought an Android tablet years ago was because they were less expensive than iPads and many/most of the wifi Android tablets had GPS in them. That allowed me to use the Android Garmin StreetPilot Onboard app without needing data.

More recently, the Android Garmin StreetPilot Onboard app is gone, but the iOS Garmin StreetPilot Onboard still appears to be available.

I am now giving some thought to a newer, faster tablet and, hopefully, one with more memory.

For those familiar with Apple products, I have a few questions:

-How well does the Garmin StreetPilot Onboard app work on an iPhone or iPad? Does Garmin keep it updated similar to stand-alone GPS versions?

-If I want GPS, do I still have to buy the Wi-Fi + Cellular version of an iPad. In the past, Apple didn't have GPS in the wifi only versions, but perhaps that has changed.

-I have noticed that noticed that a couple of the new Apple iPad pro models have switched to the USB-C connector. Are those the only Apple devices currently with that type of connector? Is Apple going to adopt that for other, newer future devices?

In all fairness, have never been much of an Apple guy. I am not militant against them, but have never really jumped on that bandwagon. For example, with regards to computers, since I am an amateur radio operator, I pretty much need a device with Windows for programming radios. I think prices are generally a bit more competitive on IBM compatible PCs. (Do we still use that phrase?)

With regards to phones, some of the features of many Android smartphones were the ability to add memory with micro SD cards and the ability to swap batteries. Unfortunately, many Androids have eliminated the ability to easily swap batteries. External battery cases have replaced that for some phones.

Anyway, back on topic, should I get an iPad and, if I do, does Garmin StreetPilot Onboard work pretty well with it?