Where do I view my statistics?

Desktop

On the web, you'll see an ongoing, live-updated weekly summary.
Pro tip:
You can manually adjust stats for the activity you do away from LingQ by clicking the + next to the correspondent statistic.
Under My Profile (access via the Community tab, or by hovering over your icon in the top right corner and then selecting Profile). You can also view different timeframes and statistical summaries based on the metric you're interested in.

iOS app

You can view your Statistics snapshot by clicking the button in the top right corner of the Library tab, then scrolling down.

Android app

You can view your Statistics snapshot by clicking the button in the top right corner of the Library tab, then scrolling down.