We have distributed crawler written in go configurable with xpath and javascript for advanced crawling using javascriptcore-go[1] and also our knowledge engine serves various form of formatted information card scripted in javascript.
Duckduckgo goodies[2] also a good example of what we've been doing.
Unlike appstore where most accounts is password protected on download because of credit card associated with their account. Most android phone user don't set such restriction, and what truth is most kids just download whatever they saw on playstore. Google did the right thing to remove a dangerous app with potential to break your device.