The specific versioning in your query ( v4-v131-univ-64bit-os120-ok14 ) indicates technical specifications for that particular build: : Refers to version 4 of the app .
: It is typically listed as a paid app (approximately $2.99 ) on the Apple App Store . Understanding the File String and iPod touch .
: The current version generally requires iOS 12.0 or later and is compatible with iPhone, iPad, and iPod touch . and iPod touch .