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The Most Important Metrics for Your Web or Mobile App

Nicolas Zubiaur
3 min read

A practical guide to KPIs for web and mobile apps, including what to measure, how to read it, and which product, growth, and quality decisions it supports.

The most common temptation after launching an app is to measure too much. Downloads, sessions, views, taps, active users, average time, bounce, cohorts, funnels. Everything feels important at once. The problem is that apps do not improve by accumulating dashboards. They improve when teams interpret signals that change real decisions.

That is why the useful question is not “what can I measure?” but “what do I need to understand in order to improve product, growth, and operations?”

Metrics should answer a decision

A good metric matters when it helps answer something concrete:

  • is acquisition bringing valuable users?
  • is onboarding working or losing people?
  • does the app create habit or get abandoned quickly?
  • are technical issues damaging conversion?
  • is a feature actually adding value or just taking up space?
  • Without that context, even a beautiful dashboard turns into noise.

    The 5 groups worth tracking first

    1. Acquisition

    This is about understanding where users come from and what quality they bring.

    Useful metrics include:

  • installs or signups by channel
  • cost per acquisition
  • conversion rate by source
  • user quality by campaign or cohort
  • It is not enough to know how many arrived. You need to know which ones move toward a valuable action.

    2. Activation

    Activation measures whether users reach initial value quickly.

    Key signals include:

  • time to first valuable action
  • onboarding completion rate
  • drop-off by step or screen
  • events that distinguish users who come back
  • This connects directly to a stronger app analytics strategy and to the kinds of product improvements described in optimizing your app with app analytics.

    3. Retention

    Retention answers the uncomfortable question: do people return because the app creates value, or did they just open it once?

    Track metrics such as:

  • day, week, or month retention
  • new vs returning user cohorts
  • usage frequency by segment
  • relationship between feature usage and return behavior
  • 4. Conversion

    Every app usually has a critical action: purchase, request, quote, full registration, account activation, or recurring usage of a key feature.

    It helps to measure:

  • total funnel conversion
  • drop-off by stage
  • impact by channel or segment
  • changes before and after relevant releases
  • 5. Performance and quality

    Many business issues begin inside something that first looks purely technical.

    Do not lose track of:

  • crashes
  • load times
  • errors by device or version
  • failures in critical steps
  • Mexico and LATAM change the picture

    Across the region, many journeys do not live only inside the app. They often mix web, call center, WhatsApp, off-flow payments, and human service. That means a purely in-app reading stays incomplete.

    When possible, app metrics should connect with CRM, campaigns, support, payments, or geography. That is where the data starts looking more like the real business.

    Be careful with vanity metrics

    Some metrics look impressive and still say very little on their own:

  • downloads without activation
  • active users without a clear goal
  • time in app without context
  • event volume without usage quality
  • It is not that they are useless. It is that, in isolation, they explain very little.

    Better measurement leads to better prioritization

    A useful metric is not the one that looks nice in a presentation. It is the one that helps teams decide what to fix first, which feature deserves more investment, and which friction is slowing growth.

    That makes measurement more demanding, but also much more valuable.

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