diff --git a/apps/pinsafe/README.md b/apps/pinsafe/README.md
index 69c1017c9..d32d94b8e 100644
--- a/apps/pinsafe/README.md
+++ b/apps/pinsafe/README.md
@@ -3,4 +3,5 @@ Stores several encrypted PINs on your watch. You can use one key to decode them
 This is safe, as long as:
 - None of the PINs can be guessed by a brute force attack.
 - All of the PINs are random.
-- Your secret key remains secret.
+- Your key is long enough (preferably as long as your PINs).
+This app requires a keyboard!