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Conversion funnel: how to find the problem with mobile purchases

You'll go from weaker results on phones to a concrete check of the purchase process.

7 min readUpdated: ConversionPractice

Short answer

The key answer

The funnel shows the scale of recorded purchase steps. Compare devices for the same period, pick a meaningful difference and verify it in user journeys and a hands-on test of the store. A drop between steps is a pointer for a check, not a ready-made diagnosis of a bug.

  • Choosing the step that needs attention
  • Comparing phones and computers together with visit counts
  • A fix description based on a specific test

1. Check which actions make up the funnel.

The steps come from available e-commerce events: product view, product click, cart, checkout start, shipping and payment info, and purchase. Not every platform delivers every step in the same way. First find out which of these actions are actually collected in your setup.

The funnel lists people with a recorded step in the selected range. Don't read the table as a recording of one continuous visit. A customer can come back, and tracking may not cover some actions. To confirm the order of steps in a specific case, you need the user journey. The checkout form's URL alone doesn't prove that all its steps were completed.

2. Compare devices on a common basis.

Choose the same period and store, then read the breakdown by device. Mobile means phones, desktop means computers. Next to the percentages, note the number of people at each step. A difference of a few percentage points based on a handful of cases calls for different caution than a similar difference across many visits.

In the table, check product, cart, checkout start and purchase. The device filter lets you narrow the funnel; browser and source views are also available. Don't compare a promotion week on phones with an ordinary week on computers. Align the range first, then ask about causes.

Flowpeek funnel segmented by device with product, cart, checkout and purchase steps
The actual funnel report by device (shown in Polish). Read the scale of each step together with the percentages; the screenshot doesn't prove what causes the difference between devices.

3. Choose a place to check, not a full rebuild.

Many product viewers and few carts point you to the offer, variant availability, price or button visibility. A gap between cart and checkout start calls for checking shipping costs and how people move on. At the final steps, it's worth looking at forms and payment methods.

This is a list of hypotheses, not an automatic verdict. Before you order a fix, check that the step is recorded correctly. An event suddenly disappearing after a release can be a tracking change, even while customers keep buying. Pick one difference that matters for the store and note how you'll check it.

4. Narrow the test to the real environment.

The devices and browsers report helps set priorities. Combine the scale of traffic with sales, order value and conversion for that group. Then check the store on the selected phone and browser. Don't try to test every possible configuration with the same intensity — start with the environment that matters to your customers.

Note the product, variant, shipping and payment method used in the test. Look at the on-screen keyboard, error messages and elements covering the button. A difference in a metric between reports can stem from a different way of counting purchases or a different period; compare readings from the same view before you call a change an improvement.

Flowpeek sales tables by device and browser
The devices report adds sales and browsers to the funnel. It's a separate breakdown; read the definitions of its metrics separately.

5. Combine journeys, testing and the post-change result.

Review the available journeys for the selected step. Look for a recurring place where visits end or return to an earlier page. These examples help you prepare a test scenario, but on their own they don't describe the customer's motivation. Add a check of the store and, if you can, conversations with users.

The task description for your team should include the environment, the step, the observation and the expected behavior. After the release, go back to the same report and filters. Take traffic, promotions and the number of cases into account. If you changed the campaign and the checkout form at the same time, don't attribute the whole difference to one fix. Note what the result still doesn't settle.

Common mistakes

01

Every difference means a phone bug

Devices can attract different traffic and people at different decision stages. Check the context and how tracking works.

02

A percentage alone is enough

Also note the number of people at each step. A small sample and an incomplete period can produce a large apparent change.

For your next review

Checklist

  • I've confirmed which steps are collected.
  • I'm comparing the same period and store.
  • I've noted the counts next to the percentages.
  • I've chosen a device and browser for the test.
  • I have a specific task description and a plan to measure again.

Now your store

Prepare a checkout review task

  1. 1

    Pick one device group and one step.

  2. 2

    Open a few available journeys and complete a test purchase.

  3. 3

    Describe the problem so that someone else can reproduce it.

From report to decision

Practice example — illustrative values

A made-up set for learning. We don't copy results from the screenshots and don't assume the cause of the difference.

Mobile
200 people with a cart, 80 who started checkout
Desktop
100 people with a cart, 60 who started checkout
Test
Shipping cost and moving on from the cart on a phone

The ratios are 40% and 60% respectively. That's a reason to check a specific step, not proof that 40 more customers would have bought after a button change.

Questions and answers

Does every drop in the funnel mean lost sales?

No. Some people are still comparing offers, and some actions may be outside the tracking scope. The report helps you decide where to check.

Does the report confirm the order of steps for each person?

A step summary doesn't replace analyzing a specific journey. Check the order of available actions at the visit level.

What if I have few orders?

Extend the comparable period and pay attention to the scale of earlier steps. A hands-on store test can still reveal a problem you can't reliably judge from a percentage alone.

Read the next guide.

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Take a closer look at the page where the difference appears.

Once you've chosen where to check, use journeys and events. Prepare one change, then come back to the same ranges in the funnel.

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