diff --git a/ui/app/os_ios.m b/ui/app/os_ios.m
index e4757f05..641aeac5 100644
--- a/ui/app/os_ios.m
+++ b/ui/app/os_ios.m
@@ -63,16 +63,6 @@ static void redraw(CFTypeRef viewRef, BOOL sync) {
 		redraw(viewRef, YES);
 	}
 }
-
-- (void)applicationDidBecomeActive:(UIApplication *)application {
-}
-
-- (void)applicationWillTerminate:(UIApplication *)application {
-}
-
-- (void)applicationDidReceiveMemoryWarning:(UIApplication *)application {
-	onLowMemory();
-}
 @end
 
 @implementation GioViewController
@@ -120,6 +110,11 @@ CGFloat _keyboardHeight;
 	redraw((__bridge CFTypeRef)view, YES);
 }
 
+- (void)didReceiveMemoryWarning {
+	onLowMemory();
+	[super didReceiveMemoryWarning];
+}
+
 - (void)keyboardWillChange:(NSNotification *)note {
 	NSDictionary *userInfo = note.userInfo;
 	CGRect f = [userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];