diff --git a/mobile/impl_empty.go b/mobile/impl_empty.go
index 0d751907b..e7cc27376 100644
--- a/mobile/impl_empty.go
+++ b/mobile/impl_empty.go
@@ -22,7 +22,7 @@ import (
 	"github.com/hajimehoshi/ebiten"
 )
 
-func render() error {
+func update() error {
 	return nil
 }
 
diff --git a/mobile/impl_mobile.go b/mobile/impl_mobile.go
index 5d3d30925..5aee11d7f 100644
--- a/mobile/impl_mobile.go
+++ b/mobile/impl_mobile.go
@@ -25,7 +25,7 @@ import (
 
 var chError <-chan error
 
-func render() error {
+func update() error {
 	if chError == nil {
 		return errors.New("mobile: chError must not be nil: Start is not called yet?")
 	}
diff --git a/mobile/mobile.go b/mobile/mobile.go
index 1451b091d..ed6de64d6 100644
--- a/mobile/mobile.go
+++ b/mobile/mobile.go
@@ -25,15 +25,15 @@ func Start(f func(*ebiten.Image) error, width, height int, scale float64, title
 	return start(f, width, height, scale, title)
 }
 
-// Render updates and renders the game.
+// Update updates and renders the game.
 //
 // This should be called on every frame.
 //
 // On Android, this should be called at onDrawFrame of Renderer (used by GLSurfaceView).
 //
 // On iOS, this should be called at glkView:drawInRect: of GLKViewDelegate.
-func Render() error {
-	return render()
+func Update() error {
+	return update()
 }
 
 // UpdateTouchesOnAndroid updates the touch state on Android.