Create a Mobile Popup

Who gets this? Shops on all Postscript plans have access to these features. Learn more about Postscript Plans.

Postscript popups are a compliant and powerful way to convert site visitors to SMS subscribers so you can nurture them with a personalized SMS program throughout the customer lifecycle. By employing a Postscript popup, you can:

  • Increase your Acquisition Rate, which in turn, improves your overall Subscriber Lifetime Value and total value of your SMS program.
  • Optimize your popup conversions by finding the best combination of popup creatives, timing, images, message copy, and incentives for your brand all through A/B testing.
  • Power a more personalized SMS experience for all susbcribers by capturing subscriber data in Postscript popups.

In this article, we guide you through how to create a mobile popup, then walk you through how to collect custom properties with Postscript popups.

Create a Mobile Popup

To begin crafting your mobile popup, select Acquisition on the left-side navigation panel. Next, select Create in the upper-right corner of the page, then select Mobile from the drop-down options.


  • Name. Choose a name that allows you to easily identify this popup from the list of available popups on your main Popups page.
  • Phone Collection Step. In the phone collection step and the custom step cards, you can adjust the copy for your pre-headline, headline, post-headline, button, and close button.
  • + Add Step/Custom Step. When you select + Add Step, you are able to add an additional step for a subscriber to enter their email address. You can also use this second step to collect custom properties. 
  • When collecting emails, you can toggle the Forward to email app option ON and select which list you'd like to forward the collected emails and custom properties to.
  • Form. This section is where you will configure your custom property collection for all steps. We discuss this in more depth below.
  • Popup settings. In the Popup settings card, you are able to adjust the style and behavior of your popup for all steps. We'll discuss both in the tab system below:
Style Behavior


  • Popup type: Select if you'd like to display a partial window or full screen popup.
  • Logo image. Upload a logo image by selecting a file from your device. You can also drag and drop the image file into the upload field.
  • Background style. Choose to have your popup background be a solid color or an image.
    • Background color. If you select a solid color background, you can enter a specific hex code for your desired color.
    • Background image. If you select a background image, you can upload the image or GIF from your device or drag and drop the file into the upload field.
  • Font. Select your preferred font. This font applies to all text on your mobile popup.
  • Corner style. Choose whether your mobile popup will have square or rounded corners.
    • Corner roundness. If you selected rounded corners, then use this field to set how round the corners should appear.
  • Primary text color. Set your primary text color by entering a hex color code. This color applies to all text on your mobile popup except button text.
  • Button color. Set the color of your subscribe button by entering a hex color code.
  • Button text color. Set the color of your subscribe button text by entering a hex color code.
  • Button style. Choose whether your CTA button will have square or rounded corners.
  • Headline font size. Adjust the size of your main headline font. The headline is 10% OFF in the example above.
  • Post-headline font size. Adjust the size of your post-headline font. The post-headline is ON YOUR ORDER in the example above.

Collect Custom Properties

Under the Form card within the popup editor, you can customize the questions for your popup. Subscriber responses will be saved as custom properties within a subscriber profile.


  1. Your opt-in method is Onsite Opt-in.
    • With Onsite Opt-in, you will see a Welcome message. You can craft the message your subscribers will receive once they opt into your SMS program via mobile popup. You can customize this message with photos, gifs, merge tags, coupons, discount links, product links, or a contact card.
  2. Select Add Question to add a question to your popup. Choose if you'd like subscribers to answer this question via freeform text or multiple choice. Their response will be added to their subscriber profile under Custom Properties.
  3. Within the Text question or Multiple choice question field, craft your question copy (for example: what's your main skin concern?). 
    • If adding a multiple choice option, be sure to add the options. You can add up to four.
  4. Under Subscriber property, add the property name you are collecting by either creating a new property or selecting an existing property. You can think of the subscriber property as the main subject of the question (for example: if you ask subscribers what their main skin concern is, the subscriber property would be "skin_concern").

Additional Resources

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