Thank you for the kind words. We are happy that Telerik Platform is your choice for mobile development.
Now, straight to your questions:
- "Can i use local sqllite and sync with online sqlserver?"
Yes, you can. Here is a good article about this and as a starting point you can check our SQLite Sample.
- "Kendoui can bind to xml?"
Again, yes it can. Here is a complete demo on that matter.
- "Cordova can use storage file área?"
Yes, even better - it has its own API that handles the most common operations for you. Here, you will find the supported storage APIs.
I hope my answers help. Please, let me know if I have missed something or more questions arise.
Share what you think about AppBuilder and Telerik Platform with us in our feedback portal, so we can become even better!