AllTrails and other apps like it put publically accessible trail/hiking maps into app form and have user reviews and trails rated for their difficulty. And they use GPS for trail navigation to help out inexperienced hikers or mitigate poorly maintained trail markers.
They also charge a subscription fee for features like the ability to download a map and use it while not connected to the internet. "Pay us or you'll get lost in the woods" is profitable, apparently.
Apple might be embedding trail maps into Apple Maps, but this article doesn't explain that.
Doorbells. I had to replace a relative's doorbell recently and the old one that lasted 60 years was built 10x better than the incredibly cheap model that all the hardware stores carry.
The options are either a cheapo doorbell that has an LED in it for no reason, a Ring surveillance doorbell, or a very expensive reproduction doorbell sold on some random website.