diff --git a/RememBirthday-UI/src/main/java/com/kunzisoft/remembirthday/activity/AboutActivity.java b/RememBirthday-UI/src/main/java/com/kunzisoft/remembirthday/activity/AboutActivity.java
index e5c72a7..5f23660 100644
--- a/RememBirthday-UI/src/main/java/com/kunzisoft/remembirthday/activity/AboutActivity.java
+++ b/RememBirthday-UI/src/main/java/com/kunzisoft/remembirthday/activity/AboutActivity.java
@@ -11,6 +11,8 @@
 
 import org.sufficientlysecure.htmltextview.HtmlTextView;
 
+import static com.kunzisoft.remembirthday.utility.Constants.DEVELOPER;
+
 /**
  * Show the about page
  */
@@ -35,11 +37,14 @@ public void onCreate(Bundle savedInstanceState) {
         HtmlTextView aboutTextView = (HtmlTextView) findViewById(R.id.activity_about_content);
 
         String htmlContent =
-                "<p>"+getString(R.string.powered_by)+" <a href=\""+ Constants.WEB_SITE +"\">"+ Constants.WEB_SITE +"</a></p>"+
+                "<p>"+getString(R.string.powered_by)+" <a href=\""+ Constants.URL_WEB_SITE +"\">"+ Constants.URL_WEB_SITE +"</a></p>"+
                 "<p>"+getString(R.string.html_text_purpose)+"</p>"+
+
                 "<h2>"+getString(R.string.participation_title)+"</h2>"+
                 "<p>"+getString(R.string.html_text_free)+"</p>"+
                 "<p>"+getString(R.string.html_text_donation)+"</p>"+
+                "<p><a href=\""+ Constants.URL_PARTICIPATION +"\">"+getString(R.string.html_see_participation_page)+"</a></p>"+
+
                 "<h2>"+getString(R.string.features_title)+"</h2>"+
                 "<p>"+getString(R.string.html_text_integration)+"</p>"+
                 "<ul>";
@@ -48,8 +53,8 @@ public void onCreate(Bundle savedInstanceState) {
         }
         htmlContent+="</ul>"+
                 "<h2>"+getString(R.string.contact_title)+"</h2>"+
-                "<p>"+getString(R.string.developer)+" : "+getString(R.string.developer_name)+"</p>"+
-                "<a href=\"mailto:"+ Constants.EMAIL +"\">"+getString(R.string.html_text_bugs)+"</a>";
+                "<p><a href=\"mailto:"+ Constants.EMAIL +"\">"+getString(R.string.html_text_bugs)+"</a></p>"+
+                "<p>"+getString(R.string.developer)+" : "+ DEVELOPER +"</p>";
 
         aboutTextView.setHtml(htmlContent);
     }
diff --git a/RememBirthday-UI/src/main/java/com/kunzisoft/remembirthday/activity/BuddyActivity.java b/RememBirthday-UI/src/main/java/com/kunzisoft/remembirthday/activity/BuddyActivity.java
index b015d19..dd31ecd 100644
--- a/RememBirthday-UI/src/main/java/com/kunzisoft/remembirthday/activity/BuddyActivity.java
+++ b/RememBirthday-UI/src/main/java/com/kunzisoft/remembirthday/activity/BuddyActivity.java
@@ -4,6 +4,7 @@
 import android.app.Activity;
 import android.content.DialogInterface;
 import android.content.Intent;
+import android.net.Uri;
 import android.os.Bundle;
 import android.support.annotation.NonNull;
 import android.support.design.widget.FloatingActionButton;
@@ -16,6 +17,7 @@
 
 import com.kunzisoft.remembirthday.R;
 import com.kunzisoft.remembirthday.element.DateUnknownYear;
+import com.kunzisoft.remembirthday.utility.Constants;
 import com.kunzisoft.remembirthday.utility.Utility;
 
 import permissions.dispatcher.NeedsPermission;
@@ -54,8 +56,19 @@ public void onClick(View view) {
             }
         });
 
-        if (Utility.isFirstTime(this))
-            new StartupDialogFragment().show(getSupportFragmentManager(), TAG_STARTUP_FRAGMENT);
+        if (Utility.isFirstTime(this)) {
+            StartupDialogFragment startupDialogFragment =
+                    new StartupDialogFragment();
+            startupDialogFragment.setOnPositiveButtonClickListener(new DialogInterface.OnClickListener() {
+                @Override
+                public void onClick(DialogInterface dialogInterface, int i) {
+                    Intent intent = new Intent(Intent.ACTION_VIEW);
+                    intent.setData(Uri.parse(Constants.URL_PARTICIPATION));
+                    startActivity(intent);
+                }
+            });
+            startupDialogFragment.show(getSupportFragmentManager(), TAG_STARTUP_FRAGMENT);
+        }
 
         //TODO BUG
         initDialogSelection(savedInstanceState);
diff --git a/RememBirthday-UI/src/main/java/com/kunzisoft/remembirthday/utility/Constants.java b/RememBirthday-UI/src/main/java/com/kunzisoft/remembirthday/utility/Constants.java
index 3b20e27..55b425f 100644
--- a/RememBirthday-UI/src/main/java/com/kunzisoft/remembirthday/utility/Constants.java
+++ b/RememBirthday-UI/src/main/java/com/kunzisoft/remembirthday/utility/Constants.java
@@ -13,7 +13,8 @@ public class Constants {
 
     public static final String DEVELOPER = "Jeremy JAMET";
     public static final String EMAIL = "contact@kunzisoft.com";
-    public static final String WEB_SITE = "http://kunzisoft.com";
+    public static final String URL_WEB_SITE = "http://kunzisoft.com/";
+    public static final String URL_PARTICIPATION = URL_WEB_SITE+"#contribute";
 
     /**
      * Get the current package version.
diff --git a/RememBirthday-UI/src/main/res/values/strings.xml b/RememBirthday-UI/src/main/res/values/strings.xml
index 01f63f7..529a2db 100644
--- a/RememBirthday-UI/src/main/res/values/strings.xml
+++ b/RememBirthday-UI/src/main/res/values/strings.xml
@@ -1,6 +1,5 @@
 <resources>
     <string name="app_name">RememBirthday</string>
-    <string name="developer_name">Jeremy JAMET</string>
 
     <string name="powered_by">Powered by</string>
     <string name="participation_title">Participation</string>
@@ -49,9 +48,10 @@
     <string name="dialog_pro_feature_download">Download</string>
 
     <string name="dialog_startup_title">Thanks to download !</string>
-    <string name="dialog_startup_cancel_button">Let me try</string>
+    <string name="dialog_startup_cancel_button">Cancel</string>
     <string name="dialog_startup_donate_button">Donate</string>
 
+    <string name="html_see_participation_page">See the participation page</string>
     <string name="html_text_purpose">This application is designed to &lt;strong&gt;easily manage the birthdays&lt;/strong&gt; of contacts on phones and tablets.</string>
     <string name="html_text_free">Unlike almost all of its competitors, it is &lt;strong&gt;without advertising&lt;/strong&gt; even in its free version.</string>
     <string name="html_text_donation">In order to keep our freedom and to be always active, we count on your &lt;strong&gt;donations.&lt;/strong&gt;</string>