If you have issues with opening one of your files in PDF Expert, please see the list of the supported file formats in PDF Expert User’s Guide available here.
Note: PDF Expert supports filling out AcroForms created in Adobe Acrobat or other similar apps and Static XFA forms created in Adobe LiveCycle. Dynamic LifeCycle (XFA) forms are not supported by the application.
If the content of the file is not displayed as expected or the app cannot open the file, please send us a sample file to rdsupport@readdle.com. If the file's size is too big for sending over email, you can upload it to any cloud storage service and share a link with us - e.g., you can use the WeTransfer service.