Compare maps
See where your maps overlap.
Paste two Worldtally links. The comparison runs in your browser: shared places in green, yours in blue, theirs in amber. Nothing is uploaded.
Your map
Paste the link from your map.
Their map
Ask them to tap Copy link.
0both visited
0only you
0only them
Both
Only you
Only them
Neither
Only you 0
Only them 0
Both 0
The comparison link carries both maps and the map type, so it can be shared without an account.
Both maps are decoded in your browser from the part of the link after #. Nothing is sent to a server. Works with the world map and all 32 regional trackers; start a map if you need one.