I cannot open this app on a Google Pixel XL. It says I need to have a barcode or key. This may be since barcodes were added  since I see that was a check-in a few months ago that may be when this first became a problem. But now I have a new phone  so it could be that  too. Not sure. It used to work fine on a Samsung Galaxy S5. Cannot use this app until this problem is fixed.
March 10 2017