diff --git a/README.md b/README.md
index ce0dc48..82fe222 100644
--- a/README.md
+++ b/README.md
@@ -139,3 +139,6 @@ The repo contains an `Example` app that demonstrates building shapes and the `Te
 ## Contributing
 
 PRs welcome. Please include unit tests for any new behavior and update examples.
+
+## Affiliation
+This is an independent tool and is not affiliated with, sponsored by, or endorsed by ForeFlight.