If you have multiple devices running Pi-hole, keeping whitelists and blacklists in sync across devices can be a chore.
pihole-sync helps keep those lists in sync across your devices.
Note: pihole-sync syncs whitelists and blacklists: the ones you see in the Whitelist and Blacklist tabs in the Pi-hole admin page. It doesn't sync blocklists (the URLs of lists of domains configured in Settings > Blocklists).
cp settings.py.example settings.py
Now edit settings.py and add details for each of the devices on your network that are running Pi-hole.
python3 sync.py