Just buy a Pixel and flash GrapheneOS on it. Or if you want a challenge, then buy a Samsung phone with an Exynos chip in it and flash some GSI (generic system image) on it.
Afaik there's KDE itineary. I don't use it but it's worth checking out. But search for city-specific web apps (e.g. imhd for Bratislava) first before using any app. Or just use your map app.
I just clicked all drives in the Anaconda installer.