While first start I was asked to allow location service for owncloud app.
I said no.
Now I enabled it by calling settings (ios dialog) and hooray I was able to select files to upload from albums.
But after uploading procedure I could not find anything inside my owncloud.
Server OS: Linux, web hosting service, no ssh
DB: MySQL 5.1.63
Desktop Client: latest version suitable to server version
Mobile version: iOS stuff