pfilters don't appear to be supported in apps. Based on the documentation:
To apply Page Filters to a dashboard, the filter bar must be visible
This is a bit of a shame as they can be a super useful way to re-use a page that requires more complex filters. For example, if you need to filter on multiple fields, or a single field with a list of many different values, or even if you're simply on a mobile device - it can be way more convenient to click on a link that takes you to a familiar page, with the filters pre-applied, then it is to spend an extra minute or two getting to a page and manually applying the filters. Manually applying filters also leaves room for error.
Also… I heard that Josh wants to run his business from his phone so perhaps we can get this support added? 😉
