diff --git a/apps/imgclock/custom.html b/apps/imgclock/custom.html
index 1506aa7d4..8c920571a 100644
--- a/apps/imgclock/custom.html
+++ b/apps/imgclock/custom.html
@@ -52,6 +52,12 @@
         <input class="form-input" id="customfile" type="file">
       </div>
     </div>
+    <div class="form-group">
+    <label class="form-switch">
+      <input type="checkbox" id="cusom16bit">
+      <i class="form-icon"></i> 16 bit images (look better, slower, not recommended)
+    </label>
+  </div>
     <div class="form-group">
       <label class="form-label" for="customcolor">Clock color</label>
       <select class="form-select" id="customcolor">
@@ -91,7 +97,7 @@
             face = {
               x : pos[0],
               y : pos[1],
-              bpp : 8,
+              bpp : document.getElementById('cusom16bit').checked ? 16 : 8,
               col : col
             };
           } else {
@@ -103,8 +109,9 @@
             y : face.y,
             col : face.col
           };
+          var imgMode = faceInfo.bpp==16 ? "rgb565" : "web";
           var img = document.querySelector(`img[face='${facenumber}']`);
-          var imgString = imageconverter.imagetoString(img, {mode:"web",output:"raw",compression:false});
+          var imgString = imageconverter.imagetoString(img, {mode:imgMode, output:"raw", compression:false});
           // send finished app
           sendCustomizedApp({
             storage:[