It uses same db as venok. Here is how it organized:
heroku config:add DATABASE_URL=postgres://ivsawjqgfrqtgd:62f1ittEw6YSIQHyVGVMynMxLq@ec2-54-247-68-87.eu-west-1.compute.amazonaws.com:5432/d9qioejlkhnviv --app obelisk-spb
Got from here:
http://stackoverflow.com/questions/5981508/share-database-between-2-apps-in-heroku