The EZ-DUZ-IT deluxe can opener is simply the best one I've ever had! It's really durable, doesn't rust, has a comfortable grip, and it's made in the USA. It's top-notch!
Check out https://browse.feddit.de/ , it's an excellent place to start! I'm not an Android user, so I don't have any experience with Jerboa, and not sure how it would fit into subscribing processes there.
It's an asphalt roof; not sure about the seam, something I see on all roofs around in my area.