That makes sense, thanks for the explanation. I agree with the conclusion 
that plus codes aren't that useful in any scenario where both users are 
online, and can just access a database with all the necessary information. 
I wonder if it would make sense for your app to use plus codes as a 
fallback for scenarios where one or both users sharing an address are 
currently *not *online?

For example, I assume the QR codes displayed by your app contain an ID 
value referencing the address data. If the QR code *also* contained a plus 
code directly, that could be used to at least display *something* even if 
the user is not currently online.

Would a statement like "1.5km to the north-west - more information if 
you're back online" be useful, or is connectivity not an issue that needs 
to be solved in your app's case?

-- 
Public site: http://www.openlocationcode.com/
Github project: https://github.com/google/open-location-code
Demo site: http://plus.codes/
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