YouVersion's Bible app allows you to download the traditional and
simplified Chinese Union Version.
http://www.youversion.com/mobile
Another option is to create/find texts of the Chinese Bible and open
them in Pleco's reader which allows you to tap on words for
definitions.
http://www.pleco.com/
If you're looking for side by side reading Accordance allows this, but
currently they have no official Chinese text releases. It's possible
to roll your own Accordance module and use it, but I haven't had much
success trying this with Chinese texts. We could ask Accordance to
consider making and selling the Chinese texts. They're responsive to
their users.
http://www.accordancebible.com/