I can't answer why they don't, but there have been a few companies in this space trying to make a business out of it. Pieceable circa 2011 was acquired by Face

I can't answer why they don't, but there have been a few companies in this space trying to make a business out of it. Pieceable circa 2011 was acquired by Facebook: http://web.archive.org/web/20111006043944/http://www.pieceable.com/viewer http://web.archive.org/web/20111006043944/http://www.pieceab... Kickfolio circa 2012 (later app.io) raised $1M but shut down some time in late 2016 or 2017: http://web.archive.org/web/20120903014851/http://kickfolio.com/ http://web.archive.org/web/20120903014851/http://kickfolio.c... AFAIK, both streamed the iOS Simulator to your browser. Making a whole app available probably raises a lot of security and privacy issues; for a demo, you probably want something closer to a playable quote: https://tenmile.quote.games/ https://tenmile.quote.games/