For Net Nanny to correctly install you have must have version 6.3.0.1 or 6.4.1.2
Check the FireOS version by opening the Settings App on the Kindle device, then select "Device Options" then go to "System Updates".You can check the FireOS version of your Kindle Fire you have by doing the following: Make sure that it is "8th Generation" or above. This screen will show the model and generation of Kindle device.Check the Kindle generation by opening the Settings App on the Kindle device, select "Device Options" then go to "About Fire Tablet".You can check the hardware generation of your Kindle Fire you have by doing the following: Kindle devices must be hardware generation 8 or higher and FireOS version 6.3.0.1 or 6.4.1.2 to run Net Nanny ®.
Q: Which Kindle devices will run Net Nanny ®?