diff --git a/FAQ.md b/FAQ.md
index 0b787718..f3e2c23c 100644
--- a/FAQ.md
+++ b/FAQ.md
@@ -630,6 +630,8 @@ Note that:
 * There is no time limit on purchases, so they cannot expire
 * Google does not expose details (name, e-mail, etc) about buyers to developers
 * An app like NetGuard cannot select which Google account to use
+* It may take a while until the Play store app has synchronized a purchase to another device
+* Play Store purchases cannot be used without the Play Store, which is also not allowed by Play Store rules
 
 If you cannot solve the problem with the purchase, you will have to contact Google about it.