4.9/5
( 854+ reviews)
Features Grnibb Black Box
A logical puzzle.
Choose the size of a black box and the number of Grnibbs you want to hide in it.
The app places the Grnibbs in the box.
Information you get when shooting light rays into the black box is needed to determine the position of the Grnibbs in the box.
Secure & Private
Your data is protected with industry-leading security protocols.
24/7 Support
Our dedicated support team is always ready to help you.
Personalization
Customize the app to match your preferences and workflow.
Screenshots
See the Grnibb Black Box in Action
Get the App Today
Download on Google Play
Available for Android 8.0 and above