Text formatting - working in Android?

Are there any special limits for highlight and markup options in Android, different to Enketeo?.

I found an older hint in: Tino_Kreutzer. Apr '15
"Just to be clear, some formatting like bold, italic, and HTML links are possible through markup in Enketo Webforms. This is not possible in the Android app, though. See http://blog.enketo.org/better-notes/ der hint:

I think, all is working now in Android/offline also? For ex. question (acknowledge) label: Verify your phone DATE, please: <;span style=“color:red”>’${today}’

As we pretest with Preview online normally. I would like to know, Is preview testing on Enketo OR Android base? If Enketo, what can we use best to test for Android (without deploying).