I used a GPS on my iPad for several years in my motorhome but the company (App) went out of business. So, we had to do something different.
I recently purchased a Rand McNally RVND-7 GPS. It does NOT have all the “bells and whistles” like the more expensive units but does the job. We wanted a GPS designed for a big RV and this one is just that. So far, it has done what we wanted it to do but we have only tested it for a couple of months and that was around town. We need to test it on a long trip next.