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Response from developer
Sorry to hear about your experience. Please have a look at the screenshots in the App Store to see how to access the sea level rise visualization. To provide users with some location context, the app does indeed show the current elevation on the first screen. After that, point your camera towards the ground and select the large blue circle/button in the center of the screen when it lights up. Then the app will show an augmented reality projection indicating sea level rise with a measuring pole. If at your location no sea level rise is projected before 2100 the app will indicate that too. Hope this helps.