diff --git a/xwords4/android/XWords4/res/values/common_rsrc.xml b/xwords4/android/XWords4/res/values/common_rsrc.xml
index 1f8e6bf26..d617d1a7c 100644
--- a/xwords4/android/XWords4/res/values/common_rsrc.xml
+++ b/xwords4/android/XWords4/res/values/common_rsrc.xml
@@ -66,6 +66,7 @@
   <string name="key_bt_addrs">key_bt_addrs</string>
   <string name="key_sms_phones">key_sms_phones</string>
   <string name="key_connstat_data">key_connstat_data</string>
+  <string name="key_dev_id">key_dev_id</string>
 
   <string name="key_notagain_sync">key_notagain_sync</string>
   <string name="key_notagain_chat">key_notagain_chat</string>
diff --git a/xwords4/android/XWords4/src/org/eehouse/android/xw4/UpdateCheckReceiver.java b/xwords4/android/XWords4/src/org/eehouse/android/xw4/UpdateCheckReceiver.java
index 0c730348e..1cc391527 100644
--- a/xwords4/android/XWords4/src/org/eehouse/android/xw4/UpdateCheckReceiver.java
+++ b/xwords4/android/XWords4/src/org/eehouse/android/xw4/UpdateCheckReceiver.java
@@ -67,6 +67,9 @@ public class UpdateCheckReceiver extends BroadcastReceiver {
     private static final String k_INDEX = "index";
     private static final String k_URL = "url";
     private static final String k_PARAMS = "params";
+    private static final String k_DEVID = "did";
+
+    private static boolean s_loggedInstaller = false; // remove after one release
     
     @Override
     public void onReceive( Context context, Intent intent )
@@ -108,7 +111,11 @@ public class UpdateCheckReceiver extends BroadcastReceiver {
         String installer = pm.getInstallerPackageName( packageName );
         if ( "com.google.android.feedback".equals( installer ) 
              || "com.android.vending".equals( installer ) ) {
-            DbgUtils.logf( "checkVersion; skipping market app" );
+            if ( !s_loggedInstaller ) {
+                DbgUtils.logf( "checkVersion; skipping market app; installer=%s", 
+                               installer );
+                s_loggedInstaller = true;
+            }
         } else {
             try { 
                 int versionCode = pm.getPackageInfo( packageName, 0 ).versionCode;
@@ -123,6 +130,7 @@ public class UpdateCheckReceiver extends BroadcastReceiver {
                     appParams.put( k_DEVOK, true );
                 }
                 params.put( k_APP, appParams );
+                params.put( k_DEVID, XWPrefs.getDevID( context ) );
             } catch ( PackageManager.NameNotFoundException nnfe ) {
                 DbgUtils.loge( nnfe );
             } catch ( org.json.JSONException jse ) {
@@ -143,6 +151,7 @@ public class UpdateCheckReceiver extends BroadcastReceiver {
         if ( 0 < dictParams.length() ) {
             try {
                 params.put( k_DICTS, dictParams );
+                params.put( k_DEVID, XWPrefs.getDevID( context ) );
             } catch ( org.json.JSONException jse ) {
                 DbgUtils.loge( jse );
             }
diff --git a/xwords4/android/XWords4/src/org/eehouse/android/xw4/XWPrefs.java b/xwords4/android/XWords4/src/org/eehouse/android/xw4/XWPrefs.java
index 8434f1f98..7fafc5c33 100644
--- a/xwords4/android/XWords4/src/org/eehouse/android/xw4/XWPrefs.java
+++ b/xwords4/android/XWords4/src/org/eehouse/android/xw4/XWPrefs.java
@@ -173,6 +173,17 @@ public class XWPrefs {
         return getPrefsStringArray( context, R.string.key_bt_addrs );
     }
 
+    public static String getDevID( Context context )
+    {
+        String id = getPrefsString( context, R.string.key_dev_id );
+        if ( null == id || 0 == id.length() ) {
+            id = String.format( "%08X-%08X", Utils.nextRandomInt(), 
+                                Utils.nextRandomInt() );
+            setPrefsString( context, R.string.key_dev_id, id );
+        }
+        return id;
+    }
+
     protected static String getPrefsString( Context context, int keyID )
     {
         String key = context.getString( keyID );