: Version 1.4.2.1 is extremely old and likely will not function correctly on modern versions of Android.
: Specifies the operating system the file is intended for. Ezpdf reader v1.4.2.1 androidh33tmad dog
: Older files are often bundled with outdated exploits or Trojans. : Version 1
: This is the "release tag" or the handle of the specific individual/group who cracked, packaged, or uploaded this particular version of the app. Ezpdf reader v1.4.2.1 androidh33tmad dog
: You miss out on years of security patches and bug fixes provided by the official developers.
: This is a popular, high-featured PDF interactive viewer and annotator for Android.