diff --git a/src/Html/Events/Extra/Mouse.elm b/src/Html/Events/Extra/Mouse.elm
index d67c88e..87eb920 100644
--- a/src/Html/Events/Extra/Mouse.elm
+++ b/src/Html/Events/Extra/Mouse.elm
@@ -75,8 +75,10 @@ Therefore they are available here with attribute `offsetPos`.
     relativePos mouseEvent =
         mouseEvent.offsetPos
 
-The `movementX/Y` properties not being compatible with Safari / iOS,
-they are not provided by this package.
+The `movementX/Y` properties are not provided by this package,
+since they are not supported by any mobile browser
+(despite the fact that official docs say the opposite as of writing at Jun, 2023) –
+and [Html.Events.Pointer][Pointer-Event] uses the same decoder.
 The `x` and `y` properties being equivalent to `clientX/Y`,
 are not provided either.
 The `screenPos` attribute provides `screenX/Y` properties in case needed,
@@ -87,6 +89,7 @@ article [A tale of two viewports][tale-viewports].
 
 [js-mouse-event]: https://developer.mozilla.org/en-US/docs/Web/API/MouseEvent
 [tale-viewports]: https://www.quirksmode.org/mobile/viewports.html
+[Pointer-Event]: Html-Events-Extra-Pointer#Event
 
 -}
 type alias Event =
diff --git a/src/Html/Events/Extra/Pointer.elm b/src/Html/Events/Extra/Pointer.elm
index b4bc260..c08f90b 100644
--- a/src/Html/Events/Extra/Pointer.elm
+++ b/src/Html/Events/Extra/Pointer.elm
@@ -52,8 +52,15 @@ And to know if the shift key was pressed:
     isShiftKeyPressed event =
         event.pointer.key.shift
 
+Note about `movementX/Y`: official docs say that support for
+[PointerEvent][PointerEventSupport] and [MouseEvent][MouseEventSupport]
+is implemented by all modern (and not) browsers, but in fact `movementX/Y` properties
+are not present on any of mobile browsers (as of writing).
+
 [PointerEvent]: https://developer.mozilla.org/en-US/docs/Web/API/PointerEvent
 [MouseEvent]: https://developer.mozilla.org/en-US/docs/Web/API/MouseEvent
+[PointerEventSupport]: https://developer.mozilla.org/en-US/docs/Web/API/PointerEvent#browser_compatibility
+[MouseEventSupport]: https://developer.mozilla.org/en-US/docs/Web/API/MouseEvent#browser_compatibility
 [Mouse-Event]: Html-Events-Extra-Mouse#Event
 
 -}