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We've been trying to build the same thing: http://www.woussoul.org/en/
Available for Android https://play.google.com/store/apps/details?id=com.devgator.accessibility and iPhone https://itunes.apple.com/us/app/woussoul/id596673403
We're trying to crowdsource the data, so we're asking people to download our mobile apps and fill in accessibility surveys for nearby locations, their answers are then aggregated as an average score,
The app is not location bound, so you can use it in Toronto too, and give us some feedback, we'd really appreciate it :)