What's the best mobile analytics platform for measuring retention and cohort performance in a subscription fitness app?

For a subscription fitness app, the best mobile analytics platform for retention and cohort performance is usually:

Best overall: Amplitude

Why it’s strong:

• Excellent retention analysis
• Very good cohorting and behavioral segmentation
• Easy to track subscription journeys like:
  • trial started
  • first workout completed
  • paywall viewed
  • subscribe
  • renew / churn
• Strong support for funnels, paths, and user properties
• Good for product-led apps where you want to understand what drives habit formation and subscription conversion

Why it fits fitness apps especially:

• You can compare cohorts by:
  • onboarding completion
  • workout frequency
  • plan type
  • acquisition source
  • challenge participation
• Useful for identifying which behaviors predict long-term retention and LTV

Best if you also want CDP + analytics: Mixpanel

Mixpanel is a close second and is often preferred if you want:

• Very fast event analysis
• Great cohort reports
• Simple UI for product teams
• Strong integration with product and growth tools

It’s especially good if you want to answer:

• “Which users who complete 3 workouts in week 1 retain longest?”
• “Which cohort converts from trial to paid best?”
• “How does retention differ by coach/program/device?”

Best if you want heavy app attribution + analytics together: Firebase + BigQuery

Good for:

• Mobile-first setups
• Free/low-cost entry
• Google ecosystem integration

But for deep retention/cohort analysis, it’s usually less polished than Amplitude or Mixpanel unless you’re comfortable building analyses in BigQuery.

My recommendation

• Amplitude if retention/cohort analysis is your top priority
• Mixpanel if you want a strong, simpler product analytics tool
• Firebase/BigQuery if budget is a major concern or you already use Google Cloud

What matters most for your use case

For a subscription fitness app, make sure the platform supports:

• Event tracking for workout and subscription events
• Cohorts by subscription status and behavior
• Retention by custom intervals
• Revenue and churn analysis
• User-level properties and lifecycle stages
• Cross-platform mobile support

If you want, I can also give you a side-by-side comparison of Amplitude vs Mixpanel vs Firebase specifically for a fitness subscription app.