Textastic only uses the syntax definitions in the "Languages" folder of a TextMate bundle and some settings from the "Preferences" folder.

For code completion, it uses its own format: https://github.com/blach/Textastic-Customization - you can find the built-in definitions in the CodeCompletion directory.

iCloud backup already backs up the files in Textastic.

But, I'm currently working on a Mac app and iCloud support in the iOS apps.

Which connection settings do you use when you get this error?

Nebulous Lite is the ad-supported version of the $4,99 app Nebulous Notes. Sync is not easy to implement. If someone decides to offer a thing that is hard to implement in an ad-supported app for free, it doesn't make it easy to implement...

You can use the "Report a problem" link on your iTunes receipt to ask the iTunes team for a refund.

Sorry, but I have no plans for an Android version of Textastic.

Hallo, was genau ist die Frage? 

Textastic unterstützt Syntax-Highlighting für C und Java. Eine Liste der unterstützten Sprachen gibt es unter http://www.textasticapp.com/v4/manual/lessons/Which_file_types_are_supported.html

Please use a separate feature request for each feature so that other people con vote for it. Thank you!

Yes, there is a problem in how iOS handles the preview:// URL scheme that is used for local preview in Textastic. The iOS media player seems to only support file:// and http:// urls. As a workaround, you can upload the file to a server and use the remote preview feature. 

Thanks a lot for sharing this information!