Google maps (on my Android) actually has offline maps for a while now but you have to manually select the region. And you can cache multiple regions at once. I've used it in the past when driving to national parks and remote areas with no phone network in some spots.

I do appreciate this feature. I wish more apps provided & tested online access.

I have also tested Gaia & All Trails maps online features, and have had mixed results with those.

I just don't think app developers take the time to test their apps in offline or poor connectivity conditions. They are used to testing procedures while using office wifi

As a frequent traveller I can say Google Maps (offline mode) sucks!

If you are fully offline, then it works as intended.

However, if you have even a tiny bit of connection, even if your connection is spotty or very slow, Google Maps refuses to use its offline data, crippling the experience and making it unusable.

I agree with the sibling comment. When I travel, I usually use 3 apps and download the offline maps of the regions I visit: Apple Maps (for iOS apps and embedded features), Google Maps, and thank god: Organic Maps.

I can recommend organic maps: https://organicmaps.app

The quality of the maps depends on the region, though. But for me it is typically good enough. I not only like the local maps, but also that I can save waypoints locally. And I can contribute things like points of interest to Open Street Map directly via the app. In my opinion, the biggest disadvantage is that there is no traffic information.