As the number of mobile respondents is still growing every month, it is critical to detect surveys or even single pages that need to be mobile-friendly. SurveyTester supports this automatic detection with a variety of tests. The tests are applied automatically in the background when a test run is created. Once the test runs are completed, the results can be viewed in the ‘Pages & Routing’ Tab.
The following tests are provided:
Minified JavaScript files
Minified CSS files
Missing Html5 form-inputs
Using Flash
Responsive design
These details are shown for each survey page, and a score is calculated for the combined survey.

Items with a RED score should be investigated as there may be a way to make them more mobile friendly.
Minified JavaScript files #
Large JavaScript files can result in large file sizes and longer loading times on mobile devices. Therefore, they should be minified to decrease their size.
Minified CSS files #
Large CSS files can result in large file sizes and longer loading times on mobile devices. Therefore, they should be minified to decrease their size.
Missing Html5 form-input #
HTML5 offers special input types for form fields, for example, showing a keyboard with only numbers for number responses or a date-selection window for date responses. Using the right Html5 input types in suitable cases is recommended.
Using Flash #
Flash is an outdated technology primarily unsupported by mobile devices and has significant security issues. Using Flash is fatal on mobile devices.
Responsive design #
Responsive design is the current way to develop and publish mobile-friendly websites and is therefore also recommended for surveys.
Our calculation is based on these factors:
Are CSS media queries used? No
Is the page using a framework like Bootstrap? No
Is a width defined for the viewport of the page?
File sizes of images #
We don’t recommend image file sizes to be larger than 1 MB. Large image file sizes can increase a page’s loading time immensely and will use up the monthly traffic of a mobile user. One possible way to confront this problem is to select the most miniature file format and/or compress the picture.