Attention: PDF Max 4 for iPhone/iPad’s Users: If you are using version 4.2 or earlier (4.1.2): Please change the Saving option to “Use Temp Folder”: Please go to the App Settings, scroll down to the Advanced Settings section, then choose the PDF Saving option to “Use Temp Folder”. The problem is that there is a bug in PDF Max 4.2/4.2.1 that may make the app crash when reopening a document. Here for more information about the PDF Saving Option in PDF Max.
PDF Max 2.0 for Mac is now available on the Mac AppStore.
PDF Max 4 for iPhone/iPad Manual is here.