Build for that. Measure for that. That’s Umetrics. What user metric do you wish you could track but can’t? Reply to this post — I’m building a Umetrics toolkit and want your ideas.

What it is: The total time a user spends confused, waiting, or re-doing work. Why it matters: Traditional analytics count time-on-site as “engagement.” That’s a lie. A 5-minute checkout should be 45 seconds. Every extra minute is a friction minute. Kill them.

Stop obsessing over volume. Start obsessing over understanding.

And the truth is simple:

What it is: “Would you be disappointed if you could no longer use this product?” Why it matters: NPS (Net Promoter Score) asks “Would you recommend?” That’s lazy. The Coffee Shop Question measures emotional dependency. High disappointment = high retention.