diff --git a/README.md b/README.md
index ce94bd1..f3adfa4 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,9 @@ Pass for iOS is available in App Store with the name "Pass - Password Store", an
 <a href="https://itunes.apple.com/us/app/pass-password-store/id1205820573?mt=8"><img alt="Download on the App Store" src="img/app_store_badge.svg" width="150"/></a>
 </p>
 
-You can also help us test beta versions through [TestFlight](https://testflight.apple.com/join/whK4zUFG).
+You can also help us test beta versions through [TestFlight](https://testflight.apple.com/join/whK4zUFG) [^1].
+
+[^1]: For iOS 12 users, you can download the TestFlight app by first "purchasing it" on a Mac using your Apple ID, then going to the purchased section of the App Store on your iOS device and downloading it from there.
 
 ## Features