Yesterday, I asked on Twitter what other marketers use to see how each screen size converts. This is very important for two major reasons:

  1. See if your mobile version of your landing page is receiving the correct monitor sizes.
  2. See at what dimensions your responsive design should adjust at.

Knowing this information will show you how much conversion rates will vary by each screen size. Larger screen sizes may need larger font sizes and image sizes.

Before getting into the code, here’s my disclaimer: Backup everything. I’m not responsible if this code causes any negative results. I’m not an expert programmer. This code makes use of the c4 variable. If you’re already using all of these “c” variables, you’ll have to program additional “c” variables (which is not shown in this tutorial).

1) Open: tracking202/static/landing.php

2) Change line 18 to:

var c4 = screen.width+'x'+screen.height;


Now you can see these stats at Overview > Group Overview, by selecting from the drop downs:

Here’s an example of what you may discover:

I’ve excluded the financial aspects, but so far my mobile page is getting a lot of non mobile users (the 1024’s and greater). This is something that I need to fix in order to maximize my conversion rate.

Side note: You can track more than just screen resolution by tweaking the c1-4 variables too (such as different browser components).

Side note 2: Line 22 of the above code shows the ‘resolution’ variable, but I couldn’t find it being recorded in MySQL, and it’s also not an option in the Group Overview so I just made it a ‘c’ variable for a quick solution.

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2 thoughts on “Prosper202 Mod – Tracking each screen resolution’s conversion rate

  1. We did a case study on screen resolution too:

    Basically CTR was best w/ the largest resolution but CVR/profit was the opposite. Really interesting stuff. There was then a debate that high-res users are more tech-savvy and thus, less likely to convert. So the best way to test this would be:

    Fit to screen +40% size (need scrolling to see the whole thing)
    Fit to screen +20% size (need minor scrolling)
    Fit to screen default
    Fit to screen -20% size
    Fit to screen -40% size

    But we haven’t had the time to test this hypothesis.

    • Thanks for sharing that case study. It is really interesting. My guess is completely different though.

      I think the font size is too small, and it looks even smaller on a high resolution screen. High resolution users were probably the least likely to read the selling points because they were so small; these users saw the headline, photos and the big call to action. Less copy that is read is often a contributor to a high CTR LP, but a lower conversion rate overall.

      The smaller screen resolution users were able to read it better and they had more narrow columns, which should also get higher readership. Many of them would be turned off/disqualified by the ad copy so they wouldn’t click through. Those that did click through were persuaded to convert.

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