Regarding Kapsel(UI5) option - can you point to some document about this front end option
You can check guides available here. Getting Started with Kapsel - Part 1 (SP09+) (please do search before posting your queries, there are already many discussion available)
You should understand about kapsel vs ui5.
e.g. Any ui5 app can be packaged with kapsel/cordova to use the native device capabilities and enterprise features like logon, logger, push, appupdate, encrypted storage etc.
Regards,
JK