New answers tagged data-monitoring
I think that QualityTime meets your needs: QualityTime (source: Google Play; click images for larger variants) QualityTime is a fun, visually engaging and easy-to-use Android app that allows you to monitor and get real time reports on how much time you spend on your smartphone and on your favorite apps.
At least on my Nexus 10: Settings → Data Usage → ⋮ menu → Network Restrictions brings up a screen where you can set whether each WiFi network is metered or not.
What you are seeing here is cellular data (mobile data) only. I am not sure what you would count as a "canonical answer", but the following three screen captures have been taken from a stock android ROM with Android 5.1.1 (as you can see by the presence of the Samsung bloatware): Data Usage (default) / with hamburger-menu / data usage, WiFi tab (click ...
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