Track Anything: The Power of Custom Metrics
When standard trackers don't cover what matters to you — how custom metrics let you quantify and improve any aspect of your life.
Weight. Sleep. Water. Mood. These are the classics of self-tracking. But what about the things that matter specifically to you?
Maybe you want to track your daily screen time. Or how many hours you spend on a creative project. Or your blood pressure. Or how many sales calls you made this week.
Standard trackers can't cover every use case. That's where custom metrics come in.
What is a custom metric?
A custom metric is any numeric value you want to track over time. You define:
- What you're measuring (a name and optional unit)
- When you log it (daily, weekly, whenever)
- The values (just numbers)
That's it. The system handles everything else — storage, trending, averages, visualization.
Examples that people actually track
Health beyond the basics:
- Blood pressure (systolic/diastolic)
- Resting heart rate
- Steps per day
- Calories consumed
- Caffeine intake (mg)
Productivity:
- Deep work hours
- Number of meetings
- Lines of code written
- Words written
- Tasks completed
Finance:
- Daily spending
- Savings balance
- Revenue (for freelancers)
- Investment portfolio value
Personal:
- Screen time
- Social interactions per week
- Minutes spent outdoors
- Creative project hours
- Guitar practice minutes
Why custom metrics matter
Everyone's life is different. The metrics that matter to a freelance designer are completely different from those that matter to a new parent or a competitive athlete.
Custom metrics give you the freedom to quantify whatever you care about, without being forced into someone else's framework.
The insight loop
The value of tracking any metric follows the same pattern:
- Log consistently — even rough estimates are better than nothing
- Spot patterns — weekly averages reveal trends you can't see day-to-day
- Make connections — correlate your custom metric with other things you track
- Adjust behavior — use the data to inform decisions
Someone tracking their "deep work hours" might discover they average 2 hours on days with meetings and 5 hours on meeting-free days. That's an actionable insight that only emerges from data.
Keep it lightweight
The temptation with custom metrics is to track everything. Resist it.
Start with one or two metrics that you genuinely care about. Track them for a month. See if the data is useful. If it is, keep going. If it isn't, drop it and try something else.
The best custom metric is one where seeing the trend actually changes your behavior. If you log it but never look at the chart, it's not worth tracking.
Your life, your metrics
No app can predict what matters to you. The most meaningful data in your life might be something no one else would think to track.
Custom metrics are the blank canvas of self-tracking. Define what matters, log the numbers, and let the patterns reveal themselves.