Product Analytics Setup: What to Track from Day One

Track from day one: signups, activation (first key action), retention (D1, D7, D30), and revenue.

3 min read·Updated July 6, 2026

TL;DR

Track from day one: signups, activation (first key action), retention (D1, D7, D30), and revenue. Use PostHog (open source), Mixpanel, or Amplitude. Instrument events before you need the data.

Introduction

Track from day one: signups, activation (first key action), retention (D1, D7, D30), and revenue. Use PostHog (open source), Mixpanel, or Amplitude. Instrument events before you need the data.

This guide is written for first-time founders and solo entrepreneurs who need practical, actionable advice — not theory. Whether you're just getting started or hitting a specific roadblock, the steps below will help you move forward with confidence.

What You Need to Know

Key events is a critical part of getting this right. Start by researching your specific requirements — they vary by business type, revenue, and location. Document your current situation before making changes.

For most founders, the practical approach is to start simple and add complexity only when your business demands it. Don't over-engineer early decisions, but don't ignore them either. Many founders regret waiting too long to address key events.

If you're operating across multiple regions (US, UK, EU), note that rules differ significantly. Always verify current regulations with official government sources or a qualified advisor.

Step-by-Step Process

Tool selection is a critical part of getting this right. Start by researching your specific requirements — they vary by business type, revenue, and location. Document your current situation before making changes.

For most founders, the practical approach is to start simple and add complexity only when your business demands it. Don't over-engineer early decisions, but don't ignore them either. Many founders regret waiting too long to address tool selection.

If you're operating across multiple regions (US, UK, EU), note that rules differ significantly. Always verify current regulations with official government sources or a qualified advisor.

Common Mistakes to Avoid

Funnel analysis is a critical part of getting this right. Start by researching your specific requirements — they vary by business type, revenue, and location. Document your current situation before making changes.

For most founders, the practical approach is to start simple and add complexity only when your business demands it. Don't over-engineer early decisions, but don't ignore them either. Many founders regret waiting too long to address funnel analysis.

If you're operating across multiple regions (US, UK, EU), note that rules differ significantly. Always verify current regulations with official government sources or a qualified advisor.

When to Get Professional Help

Retention cohorts is a critical part of getting this right. Start by researching your specific requirements — they vary by business type, revenue, and location. Document your current situation before making changes.

For most founders, the practical approach is to start simple and add complexity only when your business demands it. Don't over-engineer early decisions, but don't ignore them either. Many founders regret waiting too long to address retention cohorts.

If you're operating across multiple regions (US, UK, EU), note that rules differ significantly. Always verify current regulations with official government sources or a qualified advisor.

Key Takeaways

  • Product Analytics Setup: What to Track from Day One starts with understanding your specific situation and region.
  • Take action on one step today rather than trying to do everything at once.
  • When in doubt, consult a qualified professional for your jurisdiction.
  • Bookmark related guides below to build a complete picture.

Frequently Asked Questions

PostHog vs Mixpanel?+
PostHog is open source with generous free tier. Mixpanel has better UI for product teams.