&gt; they have to have your app installed<p>Note that for school kids, a significant user of museum services, my kid&#x27;s school issued ipads can scan any QR code and they use that in class, in fact its the only time I&#x27;ve seen someone &quot;in the wild&quot; actually using QR codes, but getting an app installed requires an impressive level of government bureaucracy and leadtime (basically once a year at curriculum review time you could get a new app added to next year&#x27;s standard system if there&#x27;s storage space and the review board approves, etc).<p>They rolled out unlocked, which led to nothing but playing games, then went thru a phase of blacklisting but there&#x27;s too much whack a mole to list everything to block, now they&#x27;re pretty well locked down.