The Cahokia AR tour app is an app where you can use technology to emulate ancient America at Cahokia mounds. One thing the app does well is use 3d models to show what history looked like back then, as if you were there looking around yourself. It also does well at giving out information about these structures so that you can learn as you explore ancient monuments. It enhances access for an audience that suffers no visual impairments or no physical touch impairments which unfortunately does alienate those that cannot see as well.
It also requires the user to touch on certain icons so that they can get added information about all the different artifacts and structures shown on the tour. This alienates those that cannot physically reach out and touch the screen themselves. I think the app has somewhat of the right idea, but it seems very clear to me it was made without thinking about accessibility at all. It is a shame that is the case as the app is clear for those that want to expand their knowledge, and yet it restricts full access to those lacking certain senses. The last thing I will cover is that they encourage users to have headphones when using the app, which once again shows that you may need to be able to hear to experience it fully.