You can get access to your database on your device over the device manager in Xcode, but also more conveniently by using some helper tools. My coworker Joe explained that in depth over here:
http://stackoverflow.com/a/28465803/4194189If you want to seed your local database with a fixture hosted in the web, you can upload it to any web storage which keeps the file unmodified and allows you to retrieve it.
If you want to operate on Heroku on the database from your device, you're out of luck for now. We don't have bindings yet, which can be used in the cloud / on Heroku.
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Marius Rackwitz
iOS Product Engineer