Does use of Genesys Tempo for iOS impact billing for customers who use by-the-hour pricing?

No, Genesys Tempo users are not treated as logged in when they use the app, and usage of the app does not impact billing. 

Does use of Genesys Tempo for iOS impact the number of simultaneous users for customers using concurrent pricing?

No, Genesys Tempo users are not treated as logged in when they use the app, and app usage does not impact the total number of concurrent users.