This is a working spike solution for using ionic, pouchdb, couchdb to facilitate 4 way sync.
P.S. : Doesn't work/breaks with pouchdb.js over 3.2.0 (tested with 3.6.0 and 5.1.0).
Credits : http://devgirl.org/2014/12/30/sync-data-using-pouchdb-in-your-ionic-framework-app/