diff --git a/admin/include/functions.php b/admin/include/functions.php
index 38a6f11e5..1e19e09b3 100644
--- a/admin/include/functions.php
+++ b/admin/include/functions.php
@@ -3669,151 +3669,3 @@ function get_piwigo_news()
 
   return $news;
 }
-
-function get_graphics_library()
-{
-  global $conf;
-
-  include_once(PHPWG_ROOT_PATH.'admin/include/image.class.php');
-
-  $library = pwg_image::get_library();
-
-  switch (pwg_image::get_library())
-  {
-    case 'imagick':
-      $img = new Imagick();
-      $version = $img->getVersion();
-      if (preg_match('/ImageMagick \d+\.\d+\.\d+-?\d*/', $version['versionString'], $match))
-      {
-        $library.= '/'.$match[0];
-      }
-      break;
-
-    case 'ext_imagick':
-      exec($conf['ext_imagick_dir'].'convert -version', $returnarray);
-      if (preg_match('/Version: ImageMagick (\d+\.\d+\.\d+-?\d*)/', $returnarray[0], $match))
-      {
-        $library.= '/'.$match[1];
-      }
-      break;
-
-    case 'gd':
-      $gd_info = gd_info();
-      $library.= '/'.@$gd_info['GD Version'];
-      break;
-  }
-
-  return $library;
-}
-
-function get_graphics_library_label()
-{
-  list($library_code, $library_version) = explode('/', get_graphics_library());
-
-  $label_for_lib = array(
-    'imagick' => 'ImageMagick',
-    'ext_imagick' => 'External ImageMagick',
-    'gd' => 'GD',
-  );
-
-  return $label_for_lib[$library_code].' '.$library_version;
-}
-
-function get_pwg_general_statitics()
-{
-  $stats = array();
-
-  $query = '
-SELECT COUNT(*)
-  FROM '.IMAGES_TABLE.'
-;';
-  list($stats['nb_photos']) = pwg_db_fetch_row(pwg_query($query));
-
-  $query = '
-SELECT COUNT(*)
-  FROM '.CATEGORIES_TABLE.'
-;';
-  list($stats['nb_categories']) = pwg_db_fetch_row(pwg_query($query));
-
-  $query = '
-SELECT COUNT(*)
-  FROM '.TAGS_TABLE.'
-;';
-  list($stats['nb_tags']) = pwg_db_fetch_row(pwg_query($query));
-
-  $query = '
-SELECT COUNT(*)
-  FROM '.IMAGE_TAG_TABLE.'
-;';
-  list($stats['nb_image_tag']) = pwg_db_fetch_row(pwg_query($query));
-
-  $query = '
-SELECT COUNT(*)
-  FROM '.USERS_TABLE.'
-;';
-  list($stats['nb_users']) = pwg_db_fetch_row(pwg_query($query));
-
-  $query = '
-SELECT
-    COUNT(*)
-  FROM '.USER_INFOS_TABLE.'
-  WHERE status IN (\'webmaster\', \'admin\')
-;';
-  list($stats['nb_admins']) = pwg_db_fetch_row(pwg_query($query));
-
-  $query = '
-SELECT COUNT(*)
-  FROM `'.GROUPS_TABLE.'`
-;';
-  list($stats['nb_groups']) = pwg_db_fetch_row(pwg_query($query));
-
-  $query = '
-SELECT COUNT(*)
-  FROM '.RATE_TABLE.'
-;';
-  list($stats['nb_rates']) = pwg_db_fetch_row(pwg_query($query));
-
-  $query = '
-SELECT
-    SUM(nb_pages)
-  FROM '.HISTORY_SUMMARY_TABLE.'
-  WHERE month IS NULL
-;';
-  list($stats['nb_views']) = pwg_db_fetch_row(pwg_query($query));
-
-  $query = '
-SELECT
-    SUM(filesize)
-  FROM '.IMAGES_TABLE.'
-;';
-  list($stats['disk_usage']) = pwg_db_fetch_row(pwg_query($query));
-
-  $query = '
-SELECT
-    COUNT(*),
-    SUM(filesize)
-  FROM '.IMAGE_FORMAT_TABLE.'
-;';
-  list($stats['nb_formats'], $stats['formats_disk_usage']) = pwg_db_fetch_row(pwg_query($query));
-
-  $stats['disk_usage'] += $stats['formats_disk_usage'];
-
-  return $stats;
-}
-
-function get_installation_date()
-{
-  $query = '
-SELECT
-    registration_date
-  FROM '.USER_INFOS_TABLE.'
-  WHERE user_id = 2
-;';
-  $users = query2array($query);
-  if (count($users) > 0)
-  {
-    return $users[0]['registration_date'];
-  }
-
-  return null;
-}
\ No newline at end of file
diff --git a/admin/intro.php b/admin/intro.php
index 4cfcb02b5..d06abcad6 100644
--- a/admin/intro.php
+++ b/admin/intro.php
@@ -109,10 +109,74 @@ if ($conf['show_newsletter_subscription'] and userprefs_get_param('show_newslett
 }
 
 
-$stats = get_pwg_general_statitics();
+$query = '
+SELECT COUNT(*)
+  FROM '.IMAGES_TABLE.'
+;';
+list($nb_photos) = pwg_db_fetch_row(pwg_query($query));
+
+$query = '
+SELECT COUNT(*)
+  FROM '.CATEGORIES_TABLE.'
+;';
+list($nb_categories) = pwg_db_fetch_row(pwg_query($query));
+
+$query = '
+SELECT COUNT(*)
+  FROM '.TAGS_TABLE.'
+;';
+list($nb_tags) = pwg_db_fetch_row(pwg_query($query));
+
+$query = '
+SELECT COUNT(*)
+  FROM '.IMAGE_TAG_TABLE.'
+;';
+list($nb_image_tag) = pwg_db_fetch_row(pwg_query($query));
+
+$query = '
+SELECT COUNT(*)
+  FROM '.USERS_TABLE.'
+;';
+list($nb_users) = pwg_db_fetch_row(pwg_query($query));
+
+$query = '
+SELECT COUNT(*)
+  FROM `'.GROUPS_TABLE.'`
+;';
+list($nb_groups) = pwg_db_fetch_row(pwg_query($query));
+
+$query = '
+SELECT COUNT(*)
+  FROM '.RATE_TABLE.'
+;';
+list($nb_rates) = pwg_db_fetch_row(pwg_query($query));
+
+$query = '
+SELECT
+    SUM(nb_pages)
+  FROM '.HISTORY_SUMMARY_TABLE.'
+  WHERE month IS NULL
+;';
+list($nb_views) = pwg_db_fetch_row(pwg_query($query));
+
+$query = '
+SELECT
+    SUM(filesize)
+  FROM '.IMAGES_TABLE.'
+;';
+list($disk_usage) = pwg_db_fetch_row(pwg_query($query));
+
+$query = '
+SELECT
+    SUM(filesize)
+  FROM '.IMAGE_FORMAT_TABLE.'
+;';
+list($formats_disk_usage) = pwg_db_fetch_row(pwg_query($query));
+
+$disk_usage+= $formats_disk_usage;
 
 $du_decimals = 1;
-$du_gb = $stats['disk_usage']/(1024*1024);
+$du_gb = $disk_usage/(1024*1024);
 if ($du_gb > 100)
 {
   $du_decimals = 0;
@@ -120,14 +184,14 @@ if ($du_gb > 100)
 
 $template->assign(
   array(
-    'NB_PHOTOS' => $stats['nb_photos'],
-    'NB_ALBUMS' => $stats['nb_categories'],
-    'NB_TAGS' => $stats['nb_tags'],
-    'NB_IMAGE_TAG' => $stats['nb_image_tag'],
-    'NB_USERS' => $stats['nb_users'],
-    'NB_GROUPS' => $stats['nb_groups'],
-    'NB_RATES' => $stats['nb_rates'],
-    'NB_VIEWS' => number_format_human_readable($stats['nb_views']),
+    'NB_PHOTOS' => $nb_photos,
+    'NB_ALBUMS' => $nb_categories,
+    'NB_TAGS' => $nb_tags,
+    'NB_IMAGE_TAG' => $nb_image_tag,
+    'NB_USERS' => $nb_users,
+    'NB_GROUPS' => $nb_groups,
+    'NB_RATES' => $nb_rates,
+    'NB_VIEWS' => number_format_human_readable($nb_views),
     'NB_PLUGINS' => count($pwg_loaded_plugins),
     'STORAGE_USED' => str_replace(' ', ' ', l10n('%sGB', number_format($du_gb, $du_decimals))),
     'U_QUICK_SYNC' => PHPWG_ROOT_PATH.'admin.php?page=site_update&site=1&quick_sync=1&pwg_token='.get_pwg_token(),
diff --git a/admin/maintenance_env.php b/admin/maintenance_env.php
index 2fd4a7440..484f4e779 100644
--- a/admin/maintenance_env.php
+++ b/admin/maintenance_env.php
@@ -301,10 +301,33 @@ $template->assign(
   );
 
 // graphics library
-$graphics_library = get_graphics_library_label();
-if (!empty($graphics_library))
+switch (pwg_image::get_library())
 {
-  $template->assign('GRAPHICS_LIBRARY', $graphics_library);
+  case 'imagick':
+    $library = 'ImageMagick';
+    $img = new Imagick();
+    $version = $img->getVersion();
+    if (preg_match('/ImageMagick \d+\.\d+\.\d+-?\d*/', $version['versionString'], $match))
+    {
+      $library = $match[0];
+    }
+    $template->assign('GRAPHICS_LIBRARY', $library);
+    break;
+
+  case 'ext_imagick':
+    $library = 'External ImageMagick';
+    exec($conf['ext_imagick_dir'].'convert -version', $returnarray);
+    if (preg_match('/Version: ImageMagick (\d+\.\d+\.\d+-?\d*)/', $returnarray[0], $match))
+    {
+      $library .= ' ' . $match[1];
+    }
+    $template->assign('GRAPHICS_LIBRARY', $library);
+    break;
+
+  case 'gd':
+    $gd_info = gd_info();
+    $template->assign('GRAPHICS_LIBRARY', 'GD '.@$gd_info['GD Version']);
+    break;
 }
 
 if ($conf['gallery_locked'])
@@ -324,15 +347,26 @@ else
     );
 }
 
-$installed_on = get_installation_date();
-if (!empty($installed_on))
+$query = '
+SELECT
+    registration_date
+  FROM '.USER_INFOS_TABLE.'
+  WHERE user_id = 2
+;';
+$users = query2array($query);
+if (count($users) > 0)
 {
-  $template->assign(
-    array(
-      'INSTALLED_ON' => format_date($installed_on, array('day', 'month', 'year')),
-      'INSTALLED_SINCE' => time_since($installed_on, 'day'),
-    )
-  );
+  $installed_on = $users[0]['registration_date'];
+
+  if (!empty($installed_on))
+  {
+    $template->assign(
+      array(
+        'INSTALLED_ON' => format_date($installed_on, array('day', 'month', 'year')),
+        'INSTALLED_SINCE' => time_since($installed_on, 'day'),
+      )
+    );
+  }
 }
 
 // +-----------------------------------------------------------------------+
diff --git a/include/config_default.inc.php b/include/config_default.inc.php
index 4bd19ce89..ea007f51d 100644
--- a/include/config_default.inc.php
+++ b/include/config_default.inc.php
@@ -273,12 +273,6 @@ $conf['update_notify_check_period'] = 24*60*60;
 // we send it again? 0 to disable.
 $conf['update_notify_reminder_period'] = 7*24*60*60;
 
-// once a week, Piwigo *anonymously* sends technical data and general
-// statistics, such as number of photos or list of plugins used. It helps
-// piwigo.org to know better how Piwigo is used. This way developers can
-// focus on features that matter most.
-$conf['send_piwigo_infos'] = true;
-
 // should the album description be displayed on all pages (value=true) or
 // only the first page (value=false)
 $conf['album_description_on_all_pages'] = false;
diff --git a/include/functions.inc.php b/include/functions.inc.php
index c5c98a51c..4a2727eba 100644
--- a/include/functions.inc.php
+++ b/include/functions.inc.php
@@ -2412,339 +2412,4 @@ SELECT
   }
 }
 
-/**
- * Piwigo *anonymously* sends technical data and general statistics, such as number
- * of photos or list of plugins used. It helps piwigo.org to know better how Piwigo
- * is used. This way developers can focus on features that matter most.
- *
- * @since 15
- */
-function send_piwigo_infos()
-{
-  global $logger, $conf;
-
-  $start_time = get_moment();
-
-  if (!$conf['send_piwigo_infos'])
-  {
-    return;
-  }
-
-  $do_send = false;
-  if (isset($conf['send_piwigo_infos_last_notice']))
-  {
-    if (strtotime($conf['send_piwigo_infos_last_notice']) < strtotime(conf_get_param('send_piwigo_infos_period', 7*24*60*60).' second ago'))
-    {
-      $do_send = true;
-    }
-  }
-  else
-  {
-    $do_send = true;
-  }
-
-  if (!$do_send)
-  {
-    return;
-  }
-
-  if (!pwg_is_dbconf_writeable())
-  {
-    return;
-  }
-
-  $exec_id = substr(sha1(random_bytes(1000)), 0, 8);
-  $logger->info('['.__FUNCTION__.'][exec='.$exec_id.'] starts now');
-
-  // we only want one send_piwigo_infos to run at once
-  if (isset($conf['send_piwigo_infos_running']))
-  { 
-    list($running_exec_id, $running_exec_start_time) = explode('-', $conf['send_piwigo_infos_running']);
-    if (time() - $running_exec_start_time > 60)
-    {
-      $logger->info('['.__FUNCTION__.'][exec='.$exec_id.'] exec='.$running_exec_id.', timeout stopped by another call to the function');
-      conf_delete_param('send_piwigo_infos_running');
-    }
-  }
-
-  $query = '
-INSERT IGNORE
-  INTO '.CONFIG_TABLE.'
-  SET param="send_piwigo_infos_running"
-    , value="'.$exec_id.'-'.time().'"
-;';
-  pwg_query($query);
-
-  list($send_piwigo_infos_running) = pwg_db_fetch_row(pwg_query('SELECT value FROM '.CONFIG_TABLE.' WHERE param = "send_piwigo_infos_running"'));
-  list($running_exec_id,) = explode('-', $send_piwigo_infos_running);
-
-  if ($running_exec_id != $exec_id)
-  {
-    $logger->info('['.__FUNCTION__.'][exec='.$exec_id.'] skip');
-    return;
-  }
-  $logger->info('['.__FUNCTION__.'][exec='.$exec_id.'] wins the race and gets the token!');
-
-  include_once(PHPWG_ROOT_PATH.'admin/include/functions.php');
-
-  list($db_current_date) = pwg_db_fetch_row(pwg_query('SELECT now();'));
-
-  if (!isset($conf['send_piwigo_infos_origin_hash']))
-  {
-    conf_update_param('send_piwigo_infos_origin_hash', sha1(random_bytes(1000)), true);
-  }
-
-  $piwigo_infos = array(
-    'origin_hash' => $conf['send_piwigo_infos_origin_hash'],
-    'technical' => array(
-      'php_version' => PHP_VERSION,
-      'piwigo_version' => PHPWG_VERSION,
-      'os_version' => PHP_OS,
-      'db_version' => pwg_get_db_version(),
-      'php_datetime' => date("Y-m-d H:i:s"),
-      'db_datetime' => $db_current_date,
-      'graphics_library' => get_graphics_library(),
-    ),
-    'general_stats' => get_pwg_general_statitics(),
-  );
-
-  // convert disk_usage from kB to mB
-  $piwigo_infos['general_stats']['disk_usage'] = intval($piwigo_infos['general_stats']['disk_usage'] / 1024);
-
-  $piwigo_infos['general_stats']['installed_on'] = get_installation_date();
-
-  // $conf['pem_plugins_category'] = 12;
-  // $conf['pem_themes_category'] = 10;
-  $url = PEM_URL . '/api/get_extension_list.php';
-  if (fetchRemote($url, $result) and $pem_extensions = @unserialize($result))
-  {
-    $official_exts = array();
-    foreach ($pem_extensions as $eid => $ext)
-    {
-      if (!empty($ext['archive_root_dir']))
-      {
-        @$official_exts[ $ext['idx_category'] ][ $ext['archive_root_dir'] ] = $eid;
-      }
-    }
-  }
-  else
-  {
-    $logger->info('['.__FUNCTION__.'][exec='.$exec_id.'] fetchRemote on '.$url.' has failed');
-  }
-
-  include_once(PHPWG_ROOT_PATH.'admin/include/plugins.class.php');
-  $plugins = new plugins();
-  $piwigo_infos['general_stats']['nb_private_plugins'] = 0;
-  $piwigo_infos['plugins'] = array();
-  foreach ($plugins->db_plugins_by_id as $plugin)
-  {
-    if ('active' == $plugin['state'])
-    {
-      $eid = null;
-      if (isset($plugins->fs_plugins[ $plugin['id'] ]))
-      {
-        $uri = $plugins->fs_plugins[ $plugin['id'] ]['uri'];
-        if (preg_match('/eid=(\d+)/', $uri, $matches))
-        {
-          $eid = $matches[1];
-        }
-      }
-
-      if (empty($eid))
-      {
-        // let's search in the data fetched from PEM
-        $eid = $official_exts[ $conf['pem_plugins_category'] ][ $plugin['id'] ] ?? null;
-      }
-
-      // we must exclude "private extensions". A private extension :
-      //
-      // * has no eid
-      // * OR has un unknown plugin_id among all "Archive root directory" in PEM
-      if (empty($eid))
-      {
-        $piwigo_infos['general_stats']['nb_private_plugins']++;
-        continue;
-      }
-
-      $piwigo_infos['plugins'][] = (empty($eid) ? 'null' : '#'.$eid).'/'.$plugin['id'].'/'.$plugin['version'];
-    }
-  }
-
-  $piwigo_infos['general_stats']['nb_plugins'] = $piwigo_infos['general_stats']['nb_private_plugins'] + count($piwigo_infos['plugins']);
-
-  include_once(PHPWG_ROOT_PATH.'admin/include/themes.class.php');
-  $themes = new themes();
-  $piwigo_infos['general_stats']['nb_private_themes'] = 0;
-  $piwigo_infos['themes'] = array();
-  $private_themes = array();
-  foreach ($themes->db_themes_by_id as $theme)
-  {
-    $theme['state'] = 'active';
-    if ('active' == $theme['state'])
-    {
-      $eid = null;
-      if (isset($themes->fs_themes[ $theme['id'] ]))
-      {
-        $uri = $themes->fs_themes[ $theme['id'] ]['uri'];
-        if (preg_match('/eid=(\d+)/', $uri, $matches))
-        {
-          $eid = $matches[1];
-        }
-      }
-
-      if (empty($eid))
-      {
-        // let's search in the data fetched from PEM
-        $eid = $official_exts[ $conf['pem_themes_category'] ][ $theme['id'] ] ?? null;
-      }
-
-      // we must exclude "private extensions". A private extension :
-      //
-      // * has no eid
-      // * OR has un unknown theme_id among all "Archive root directory" in PEM
-      if (empty($eid))
-      {
-        $private_themes[ $theme['id'] ] = 1;
-        continue;
-      }
-
-      $piwigo_infos['themes'][] = (empty($eid) ? 'null' : '#'.$eid).'/'.$theme['id'].'/'.$theme['version'];
-    }
-  }
-
-  $piwigo_infos['general_stats']['nb_private_themes'] = count(array_keys($private_themes));
-  $piwigo_infos['general_stats']['nb_themes'] = $piwigo_infos['general_stats']['nb_private_themes'] + count($piwigo_infos['themes']);
-
-  $default_theme = get_default_theme();
-  if (isset($private_themes[$default_theme]))
-  {
-    $default_theme = 'private theme';
-  }
-  $piwigo_infos['general_stats']['default_theme'] = $default_theme;
-
-  $piwigo_infos['themes_usage'] = array();
-  $query = '
-SELECT
-    theme,
-    COUNT(*) AS theme_counter
-  FROM '.USER_INFOS_TABLE.'
-  GROUP BY theme
-  ORDER BY theme
-;';
-  $themes_used = query2array($query, 'theme', 'theme_counter');
-  foreach ($themes_used as $theme_used => $counter)
-  {
-    if (isset($private_themes[$theme_used]))
-    {
-      $theme_used = 'private theme';
-    }
-
-    @$piwigo_infos['themes_usage'][$theme_used] += $counter;
-  }
-
-  $piwigo_infos['general_stats']['default_language'] = get_default_language();
-
-  $query = '
-SELECT
-    language,
-    COUNT(*) AS language_counter
-  FROM '.USER_INFOS_TABLE.'
-  GROUP BY language
-  ORDER BY language
-;';
-  $piwigo_infos['languages_usage'] = query2array($query, 'language', 'language_counter');
-
-  $piwigo_infos['activities'] = array();
-  $piwigo_infos['general_stats']['nb_activities'] = 0;
-
-  $query = '
-SELECT
-    object,
-    action,
-    COUNT(*) AS counter
-  FROM '.ACTIVITY_TABLE.'
-  WHERE object != \'system\'
-  GROUP BY object, action
-;';
-  $activities = query2array($query);
-  foreach ($activities as $activity)
-  {
-    $piwigo_infos['general_stats']['nb_activities'] += $activity['counter'];
-    @$piwigo_infos['activities'][ $activity['object'] ][ $activity['action'] ] = $activity['counter'];
-  }
-
-  $label_for_system_object_id = array(
-    1 => 'core',
-    2 => 'plugin',
-    3 => 'theme',
-  );
-
-  $query = '
-SELECT
-    object,
-    object_id,
-    action,
-    COUNT(*) AS counter
-  FROM '.ACTIVITY_TABLE.'
-  WHERE object = \'system\'
-  GROUP BY object, object_id, action
-;';
-  $activities = query2array($query);
-  foreach ($activities as $activity)
-  {
-    @$piwigo_infos['activities'][ $activity['object'] ][ $label_for_system_object_id[ $activity['object_id'] ] ?? 'undefined' ][ $activity['action'] ] = $activity['counter'];
-  }
-
-  $watermark = ImageStdParams::get_watermark();
-
-  $piwigo_infos['features'] = array(
-    'use_watermark' => !empty($watermark->file) ? 'yes' : 'no',
-  );
-
-  $features = array(
-    'activate_comments',
-    'rate',
-    'log',
-    'history_guest',
-    'history_admin',
-  );
-
-  foreach ($features as $feature)
-  {
-    $piwigo_infos['features'][$feature] = $conf[$feature] ? 'yes' : 'no';
-  }
-
-  $url = conf_get_param('send_piwigo_infos_update_url', PHPWG_URL).'/ws.php';
-
-  $get_data = array(
-    'format' => 'php',
-    'method' => 'porg.installs.update',
-    'origin_hash' => $piwigo_infos['origin_hash'],
-    );
-
-  $post_data = array(
-    'data' => json_encode($piwigo_infos)
-    );
-
-  if (!fetchRemote($url, $result, $get_data, $post_data))
-  {
-    $logger->info('['.__FUNCTION__.'][exec='.$exec_id.'] fetchRemote on '.$url.' method=porg.installs.update has failed');
-
-    // let's fake a last_notice so that we only try 1 day later
-    $last_notice = isset($conf['send_piwigo_infos_last_notice']) ? strtotime($conf['send_piwigo_infos_last_notice']) : time();
-    $last_notice += 24*60*60;
-
-    conf_update_param('send_piwigo_infos_last_notice', date('c', $last_notice));
-  }
-  else
-  {
-    conf_update_param('send_piwigo_infos_last_notice', date('c'));
-  }
-
-  echo '<pre>'; print_r($piwigo_infos); echo '</pre>';
-
-  conf_delete_param('send_piwigo_infos_running');
-  $logger->info('['.__FUNCTION__.'][exec='.$exec_id.'] executed in '.get_elapsed_time($start_time, get_moment()));
-}
-
 ?>
diff --git a/include/page_tail.php b/include/page_tail.php
index 947091fe0..f7f8fa2d1 100644
--- a/include/page_tail.php
+++ b/include/page_tail.php
@@ -49,8 +49,6 @@ if ($conf['update_notify_check_period'] > 0)
   }
 }
 
-send_piwigo_infos();
-
 //------------------------------------------------------------- generation time
 $debug_vars = array();