This app reads from a plain socket and plots all the numeric information. It also can show text messages if you send a text messege starting with "@". The code you need in arduino is pretty simple: Serial. println; For the moment only 1 graph is possible, in the future I will add CSV support.
Www.digitald20.com is the developer of the app which can be found in the Tools category. Arduino YUN plotter has been downloaded and installed by over 0,5K users and its most recent update was released on Jun 13, 2016. Google Play shows that this application is rated 4.5 by its users.
Get the setup package of Arduino YUN plotter 0.8 that is absolutely free of charge and have a look at users' reviews on Droid Informer. The app runs flawlessly on Android 4.3 and above. The app is totally safe for downloading.