How to completely clear my device of a particular company's apps?
The easiest way is through the web for Google Play. Using the seach bar, bring up the name of one of the suspected apps like Clean Master or any of the apps listed in the article like Kika. Using this page, click the hyperlink for the COMPANY, below the appname. This will bring up all apps for that company, and the card for each app that you have installed will have a green check mark in the bottom right of the card. Selecting in this fashion allows the user some confidence that all his apps from that specific company can be identified. Unfortunately, while the specific app card yields a pseudo-button "Installed", it does not allow uninstall or disable via the web interface. Using the list however, the user would search out, uninstall (or disable) the now-exposed apps directly from the device.

Settings &gt; Apps &gt; &lt;selected app&gt; &gt; Uninstall or Disable