Final verison

appinventor/components/src/com/google/appinventor/components/common/YaVersion.java

@@ -171,7 +171,7 @@ public class YaVersion {
   // For YOUNG_ANDROID_VERSION 55:
   // - ACCELEROMETERSENSOR_COMPONENT_VERSION was incremented to 2.
 
-  public static final int YOUNG_ANDROID_VERSION = 54;
+  public static final int YOUNG_ANDROID_VERSION = 55;
 
   // ............................... Blocks Language Version Number ...............................
 

appinventor/components/src/com/google/appinventor/components/runtime/AccelerometerSensor.java

@@ -109,7 +109,7 @@ public class AccelerometerSensor extends AndroidNonvisibleComponent
     sensorManager = (SensorManager) container.$context().getSystemService(Context.SENSOR_SERVICE);
     accelerometerSensor = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
     startListening();
-    MinimumInterval(300);
+    MinimumInterval(400);
   }
   
   /**
@@ -134,7 +134,7 @@ public class AccelerometerSensor extends AndroidNonvisibleComponent
    * @param interval  minimum interval in ms
    */
   @DesignerProperty(editorType = PropertyTypeConstants.PROPERTY_TYPE_NON_NEGATIVE_INTEGER,
-      defaultValue = "300")
+      defaultValue = "400") //Default value derived by trial of 12 people on 3 different devices
   @SimpleProperty
   public void MinimumInterval(int interval) {
     MinimumInterval = interval;

appinventor/docs/learn/reference/components/sensors.html

@@ -138,6 +138,20 @@
         <dd>
          Acceleration in the Z-dimension.
         </dd>
+        <dt>
+         <code class="c2">
+           MinimumInterval
+         </code>
+        </dt>
+        <dd>
+         Minimum time interval between phone shakes.
+  		 <br/>
+           You may want to change the time interval depending on the activity you want to perform when the phone is shaken.
+           For example, you may want the phone to say "Stop shaking me" each time the user shakes the phone. At shorter time intervals, this 
+           will produce an unwanted echo effect. 
+  		   In another case, you may want a quick flick of the phone to be considered a single shake and perhaps increment a 
+           counter each time the phone shakes. In cases such as this, a shorter time interval will be more appropriate to properly count the shakes.
+        </dd>
        </dl>
        <h3>
         Events