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Bryan Leaman 6Bryan Leaman 6 

How to tell which lightning or classic app is a user using

Is there any way to report or check which app a user is using or to track usage of apps?
SwethaSwetha (Salesforce Developers) 
HI Bryan,
You can create an Identity Users Report. See With this, you can fetch information about single sign-on and connected app usage.

Hope this helps!Thank you
Bryan Leaman 6Bryan Leaman 6
Swetha, Sorry I guess I wasn't clear. I want to know which Lightning Apps (collections of tabs defined in App Manager) people are actually using vs. what we thought they were using. Actually, the same would be helpful in classic. For example, we recently became aware that one department was using the App Selector to work from a Custom Sales App instead of the one we designed for that department to use.

I really wish salesforce hadn't overloaded the term "App" they way they did. It's confusing for everybody.