diff --git a/www/js/rpg_core.js b/www/js/rpg_core.js
index 63d2d66..2abba0b 100644
--- a/www/js/rpg_core.js
+++ b/www/js/rpg_core.js
@@ -1883,7 +1883,10 @@ Graphics.render = function(stage) {
         this._skipCount--;
         this._rendered = false;
     }
-    this.frameCount++;
+    // NOTE: frameCount is intentionally NOT incremented here. Incrementing it
+    // per render ties it to the monitor refresh rate, which makes the playtime
+    // clock run fast on high-refresh-rate displays. It is now incremented once
+    // per fixed 60Hz logic tick in SceneManager.updateMain instead.
 };
 
 /**
diff --git a/www/js/rpg_managers.js b/www/js/rpg_managers.js
index 51f45eb..8bcc8f8 100644
--- a/www/js/rpg_managers.js
+++ b/www/js/rpg_managers.js
@@ -1971,6 +1971,7 @@ SceneManager.updateMain = function() {
     if (Utils.isMobileSafari()) {
         this.changeScene();
         this.updateScene();
+        Graphics.frameCount++;
     } else {
         var newTime = this._getTimeInMsWithoutMobileSafari();
         var fTime = (newTime - this._currentTime) / 1000;
@@ -1981,6 +1982,9 @@ SceneManager.updateMain = function() {
             this.updateInputData();
             this.changeScene();
             this.updateScene();
+            // Tie the playtime/animation clock to the fixed 60Hz logic step so
+            // it stays accurate regardless of the display's refresh rate.
+            Graphics.frameCount++;
             this._accumulator -= this._deltaTime;
         }
     }