You can buy maps that work entirely offline for your phone (they take up a lot of memory), but they are not necessary once your trip is mapped with a data connection. The entire trip is loaded (at least on Google), and GPS is still active and will give you audio and screen directions. You no longer need a cellular connection for the trip.The only scenario where I might consider it is if I frequently drive somewhere without cellular data signal, but even then I'd probably just get a $50 portable GPS from Amazon instead of paying that insane software patch fee. And with Google maps on your phone, you can usually download offline maps to use when you have no cell coverage.
You are a prime candidate for CarPlay, then. If you can take time to figure it out for yourself, it allows you to use apple maps or, even better, Waze. Waze is updated frequently and lists speed limits. It even has construction speed limits when they are a lengthy repair. In CarPlay your Kia will display your phone app on the big screen and will allow touch control, too.My husband just discovered this too... We are getting quite enamored with the Kia map program. I will not use phones. I want a big screen. We have a lovely separate GPS that came with maps forever, but the last time we tried to update it a few years ago it failed. We need to call the vendor, but it doesn't happen... Our separate one AND the Kia one have upcoming turns in a way the driver can see them plus I like speed limit displayed because at least here in Texas they change constantly as you drive down the road, often for no reason that you can figure out.
Mostly we would need an update for speed limit changes.
Kia's monitor layout is such you can have the map program open and do something else and it's easy to go back and forth. We never used our Prius GPS.