How can I check what is stored in my Core Data Database?

Here is my solution(works on iOS 9):

I use an automator/bash script that open the database in sqllitebrowser. the script finds the latest installed app in the simulator.
Instructions:

1. Install DB Browser for SQLite (http://sqlitebrowser.org/)
2. Create new workflow in Apple Automator.
3. Drag “Run Shell script block” and paste this code:

cd ~/Library/Developer/CoreSimulator/Devices/
cd `ls -t | head -n 1`/data/Containers/Data/Application 
cd `ls -t | head -n 1`/Documents
open -a DB\ Browser\ for\ SQLite ./YOUR_DATABASE_NAME.sqlite

4. (Optional) Convert this workflow to application, save it and drag it to your dock. To refresh the database just click on the app icon.