This is a pretty darn cool app. Browse the surface of Mars. You can see it in one of eight styles, at least one of which is satellite (labelled), a couple of which are topo lines and four that use color but aren't explained as to what they show. The help screen just describes them all as "Color styles." You can set the elevation style to exaggerate elevations. I give it four stars.
You can view it in any orientation. And you can pinch and spread to zoom in and out. You can share a specific view by using the menu and selecting share. It will send a JPG of the current screen view to your Dropbox, email or Facebook or various other apps on your device, but not directly to your Photos. When you start the app, there's an info box that you can minimize by tapping on the x and it becomes very tiny in the lower left hand corner. It is not visible, whether minimized or not, when you save a screenshot.
Note that it requires a pretty good chunk of space on your device--95 MB.
7 of 8 reviews are four stars and above.
There are two other similar apps by the same developer, one for Earth at $2.99 and one for the Moon at $0.99. They are shown below.
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