Mars Rover Photos is a good Android app for viewing images from the surface of Mars, as it combines the feeds of the images taken by NASA's current and past rovers and landers.
But it presents a confusing ordering of the images and isn't being updated with the latest ones. Also, the developer still hasn't released the paid, ad-free version of the app he told me about over a year ago.
Here's the app on my Pixel 4 XL.
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