The app is a great resource considering that the museum is not available at this time. I think that the app itself is interesting, as it does provide a more immersive experience with history. Immediately my first concern was how quickly the app expects someone to be able to navigate the site, as it says the app provides a 90-minute tour. It definitely is dependant on the user being able to navigate the Cahokia site, and in a timely manner. This would restrict the navigation for people, in addition to the limited public transit options to reach the site.  

 The app is also potentially difficult to navigate for someone who cannot see, as it is a visual augmented reality tool, though it presumably has text that could be converted to speech. Due to this, it might make the app less useful and therefore restrict the number of people who could use it.  

I also haven’t been able to find if the app uses more than English for its information, and since it’s not explicitly mentioned, that makes me think it might not be an option – or maybe will be an option eventually. This is a restriction of access because, according to their website, the Cahokia Mounds see approximately 350,000 tourists every year, from dozens of countries, many of which may not speak or read English well enough to navigate the app  (CahokiaMounds.org).  

All that to say, the app itself looks very cool, and would be a wonderful resource especially to contextualize history in the space it now exists.