diff --git a/config.default.php b/config.default.php
index 262fcb9..e3a80db 100755
--- a/config.default.php
+++ b/config.default.php
@@ -48,6 +48,7 @@ $dbhost = ""; // mysql host, eg. localhost
 $dbuser = ""; // database user
 $dbpass = ""; // database pass
 $dbname = ""; // database name
+$dbprefix = ""; // optional table names prefix, eg. "ulogger_"
 
 // other
 // require login/password authentication
diff --git a/helpers/config.php b/helpers/config.php
index e30bb77..fec4073 100644
--- a/helpers/config.php
+++ b/helpers/config.php
@@ -49,6 +49,7 @@
     static $dbuser = ""; // database user
     static $dbpass = ""; // database pass
     static $dbname = ""; // database name
+    static $dbprefix = ""; // optional table names prefix, eg. "ulogger_"
 
     // require login/password authentication
     static $require_authentication = true;
@@ -112,6 +113,7 @@
       if (isset($dbuser)) { self::$dbuser = $dbuser; }
       if (isset($dbpass)) { self::$dbpass = $dbpass; }
       if (isset($dbname)) { self::$dbname = $dbname; }
+      if (isset($dbprefix)) { self::$dbprefix = $dbprefix; }
       if (isset($require_authentication)) { self::$require_authentication = (bool) $require_authentication; }
       if (isset($public_tracks)) { self::$public_tracks = (bool) $public_tracks; }
       if (isset($admin_user)) { self::$admin_user = $admin_user; }
diff --git a/helpers/db.php b/helpers/db.php
index e28b800..b0625fe 100644
--- a/helpers/db.php
+++ b/helpers/db.php
@@ -30,6 +30,13 @@
      */
     protected static $instance;
 
+    /**
+     * Table names
+     *
+     * @var array Array of names
+     */
+    protected static $tables;
+
    /**
     * Private constuctor
     *
@@ -57,8 +64,23 @@
       if (!self::$instance) {
         $config = new uConfig();
         self::$instance = new self($config::$dbhost, $config::$dbuser, $config::$dbpass, $config::$dbname);
+        self::$tables = [];
+        $prefix = preg_replace('/[^a-z0-9_]/i', '', $config::$dbprefix);
+        self::$tables['positions'] = $prefix . "positions";
+        self::$tables['tracks'] = $prefix . "tracks";
+        self::$tables['users'] = $prefix . "users";
       }
       return self::$instance;
     }
+
+   /**
+    * Get full table name including prefix
+    *
+    * @param string $name Name
+    * @return string Full table name
+    */
+    public function table($name) {
+      return self::$tables[$name];
+    }
   }
 ?>
\ No newline at end of file
diff --git a/helpers/position.php b/helpers/position.php
index 36ab153..6170fb3 100644
--- a/helpers/position.php
+++ b/helpers/position.php
@@ -55,7 +55,7 @@
         $query = "SELECT p.id, p.time, p.user_id, p.track_id,
                   p.latitude, p.longitude, p.altitude, p.speed, p.bearing, p.accuracy, p.provider,
                   p.comment, p.image_id, u.login, t.name
-                  FROM positions p
+                  FROM `" . self::$db->table('positions') . "` p
                   LEFT JOIN users u ON (p.user_id = u.id)
                   LEFT JOIN tracks t ON (p.track_id = t.id)
                   WHERE id = ? LIMIT 1";
@@ -84,7 +84,7 @@
     public function add($userId, $trackId, $time, $lat, $lon, $altitude, $speed, $bearing, $accuracy, $provider, $comment, $imageId) {
       $positionId = false;
       if (!is_null($lat) && !is_null($lon) && !is_null($time) && !empty($userId) && !empty($trackId)) {
-        $query = "INSERT INTO positions
+        $query = "INSERT INTO `" . self::$db->table('positions') . "`
                 (user_id, track_id,
                 time, latitude, longitude, altitude, speed, bearing, accuracy, provider, comment, image_id)
                 VALUES (?, ?, FROM_UNIXTIME(?), ?, ?, ?, ?, ?, ?, ?, ?, ?)";
@@ -120,7 +120,7 @@
           $args[0] .= "i";
           $args[2] = &$trackId;
         }
-        $query = "DELETE FROM positions $where";
+        $query = "DELETE FROM `" . self::$db->table('positions') . "` $where";
         $stmt = self::$db->prepare($query);
         call_user_func_array([ $stmt, 'bind_param' ], $args);
         $stmt->execute();
@@ -150,7 +150,7 @@
       $query = "SELECT p.id, p.time, p.user_id, p.track_id,
                 p.latitude, p.longitude, p.altitude, p.speed, p.bearing, p.accuracy, p.provider,
                 p.comment, p.image_id, u.login, t.name
-                FROM positions p
+                FROM `" . self::$db->table('positions') . "` p
                 LEFT JOIN users u ON (p.user_id = u.id)
                 LEFT JOIN tracks t ON (p.track_id = t.id)
                 $where
@@ -182,7 +182,7 @@
       $query = "SELECT p.id, p.time, p.user_id, p.track_id,
                 p.latitude, p.longitude, p.altitude, p.speed, p.bearing, p.accuracy, p.provider,
                 p.comment, p.image_id, u.login, t.name
-                FROM positions p
+                FROM `" . self::$db->table('positions') . "` p
                 LEFT JOIN users u ON (p.user_id = u.id)
                 LEFT JOIN tracks t ON (p.track_id = t.id)
                 $where
diff --git a/helpers/track.php b/helpers/track.php
index 0425bf9..36491d1 100644
--- a/helpers/track.php
+++ b/helpers/track.php
@@ -43,7 +43,8 @@
       self::$db = uDb::getInstance();
 
       if (!empty($trackId)) {
-        $stmt = self::$db->prepare("SELECT id, user_id, name, comment FROM tracks WHERE id = ? LIMIT 1");
+        $query = "SELECT id, user_id, name, comment FROM `" . self::$db->table('tracks') . "` WHERE id = ? LIMIT 1";
+        $stmt = self::$db->prepare($query);
         $stmt->bind_param('i', $trackId);
         $stmt->execute();
         $stmt->bind_result($this->id, $this->userId, $this->name, $this->comment);
@@ -66,7 +67,7 @@
     public function add($userId, $name, $comment = NULL) {
       $trackId = false;
       if (!empty($userId) && !empty($name)) {
-        $query = "INSERT INTO tracks (user_id, name, comment) VALUES (?, ?, ?)";
+        $query = "INSERT INTO `" . self::$db->table('tracks') . "` (user_id, name, comment) VALUES (?, ?, ?)";
         $stmt = self::$db->prepare($query);
         $stmt->bind_param('iss', $userId, $name, $comment);
         $stmt->execute();
@@ -92,7 +93,7 @@
           return false;
         }
         // delete track metadata
-        $query = "DELETE FROM tracks WHERE id = ?";
+        $query = "DELETE FROM `" . self::$db->table('tracks') . "` WHERE id = ?";
         $stmt = self::$db->prepare($query);
         $stmt->bind_param('i', $this->id);
         $stmt->execute();
@@ -122,7 +123,7 @@
       if (is_null($comment)) { $comment = $this->comment; }
       if ($comment == "") { $comment = NULL; }
       if ($this->isValid) {
-        $query = "UPDATE tracks SET name = ?, comment = ? WHERE id = ?";
+        $query = "UPDATE `" . self::$db->table('tracks') . "` SET name = ?, comment = ? WHERE id = ?";
         $stmt = self::$db->prepare($query);
         $stmt->bind_param('ssi', $name, $comment, $this->id);
         $stmt->execute();
@@ -145,7 +146,7 @@
     public function deleteAll($userId) {
       $ret = false;
       if (!empty($userId)) {
-        $query = "DELETE FROM tracks WHERE user_id = ?";
+        $query = "DELETE FROM `" . self::$db->table('tracks') . "` WHERE user_id = ?";
         $stmt = self::$db->prepare($query);
         $stmt->bind_param('i', $userId);
         $stmt->execute();
@@ -169,7 +170,7 @@
       } else {
         $where = "";
       }
-      $query = "SELECT id, user_id, name, comment FROM tracks $where ORDER BY id DESC";
+      $query = "SELECT id, user_id, name, comment FROM `" . self::$db->table('tracks') . "` $where ORDER BY id DESC";
       $result = self::$db->query($query);
       if ($result === false) {
         return false;
diff --git a/helpers/user.php b/helpers/user.php
index 646a380..97e2395 100644
--- a/helpers/user.php
+++ b/helpers/user.php
@@ -44,7 +44,8 @@
     public function __construct($login = NULL) {
       self::$db = uDb::getInstance();
       if (!empty($login)) {
-        $stmt = self::$db->prepare("SELECT id, login, password FROM users WHERE login = ? LIMIT 1");
+        $sql = "SELECT id, login, password FROM `" . self::$db->table('users') . "` WHERE login = ? LIMIT 1";
+        $stmt = self::$db->prepare($sql);
         $stmt->bind_param('s', $login);
         $stmt->execute();
         $stmt->bind_result($this->id, $this->login, $this->hash);
@@ -67,7 +68,7 @@
       $userid = false;
       if (!empty($login) && !empty($pass) && $this->validPassStrength($pass)) {
         $hash = password_hash($pass, PASSWORD_DEFAULT);
-        $sql = "INSERT INTO users (login, password) VALUES (?, ?)";
+        $sql = "INSERT INTO `" . self::$db->table('users') . "` (login, password) VALUES (?, ?)";
         $stmt = self::$db->prepare($sql);
         $stmt->bind_param('ss', $login, $hash);
         $stmt->execute();
@@ -99,7 +100,7 @@
           return false;
         }
         // remove user
-        $sql = "DELETE FROM users WHERE id = ?";
+        $sql = "DELETE FROM `" . self::$db->table('users') . "` WHERE id = ?";
         $stmt = self::$db->prepare($sql);
         $stmt->bind_param('i', $this->id);
         $stmt->execute();
@@ -126,7 +127,7 @@
       $ret = false;
       if ($this->validPassStrength($pass)) {
         $hash = password_hash($pass, PASSWORD_DEFAULT);
-        $sql = "UPDATE users SET password = ? WHERE login = ?";
+        $sql = "UPDATE `" . self::$db->table('users') . "` SET password = ? WHERE login = ?";
         $stmt = self::$db->prepare($sql);
         $stmt->bind_param('ss', $hash, $this->login);
         $stmt->execute();
@@ -188,7 +189,7 @@
     * @return array|bool Array of uUser users, false on error
     */
     public function getAll() {
-      $query = "SELECT id, login, password FROM users ORDER BY login";
+      $query = "SELECT id, login, password FROM `" . self::$db->table('users') . "` ORDER BY login";
       $result = self::$db->query($query);
       if ($result === false) {
         return false;
diff --git a/lang/en.php b/lang/en.php
index 50e8a55..23e09b4 100644
--- a/lang/en.php
+++ b/lang/en.php
@@ -40,7 +40,7 @@ $langSetup["passfunchack"] = "Please edit 'helpers/user.php' file and uncomment
 $langSetup["dorestart"] = "Please restart this script when you are done.";
 $langSetup["createconfig"] = "Please create 'config.php' file in root folder. You may start by copying it from 'config.default.php'. Make sure that you adjust config values to match your needs and your database setup.";
 $langSetup["nodbsettings"] = "You must provide your database credentials in 'config.php' file (%s)."; // substitutes variable names
-$langSetup["scriptdesc"] = "This script will set up tables needed for µlogger. They will be created in your database named %s. Warning, if the tables already exist they will be dropped and recreated, their content will be destroyed."; // substitutes db name
+$langSetup["scriptdesc"] = "This script will set up tables needed for µlogger (%s). They will be created in your database named %s. Warning, if the tables already exist they will be dropped and recreated, their content will be destroyed."; // substitutes table names and db name
 $langSetup["scriptdesc2"] = "When done the script will ask you to provide user name and password for your µlogger user.";
 $langSetup["startbutton"] = "Press to start";
 $langSetup["restartbutton"] = "Restart";
diff --git a/lang/pl.php b/lang/pl.php
index a0922f8..ea77f32 100644
--- a/lang/pl.php
+++ b/lang/pl.php
@@ -37,7 +37,7 @@ $langSetup["passfunchack"] = "Otwórz proszę plik 'helpers/user.php' w edytorze
 $langSetup["dorestart"] = "Uruchom ten skrypt ponownie, kiedy zakończysz.";
 $langSetup["createconfig"] = "Utwórz proszę plik 'config.php' w głównym folderze. Możesz skopiować jego początkową zawartość z pliku 'config.default.php'. Pamiętaj, żeby dostosować konfiguracje do swoich potrzeb i ustawień bazy danych.";
 $langSetup["nodbsettings"] = "Musisz skonfigurować parametry dostępu do bazy danych w pliku 'config.php' (%s).";
-$langSetup["scriptdesc"] = "Ten skrypt utworzy tablice niezbędne do działania aplikacji µlogger. Zostaną one utworzone w bazie danych o nazwie %s. Uwaga, jeśli tablice już istnieją, zostaną usunięte i utworzone ponownie, ich zawartość zostanie skasowana.";
+$langSetup["scriptdesc"] = "Ten skrypt utworzy tablice niezbędne do działania aplikacji µlogger (%s). Zostaną one utworzone w bazie danych o nazwie %s. Uwaga, jeśli tablice już istnieją, zostaną usunięte i utworzone ponownie, ich zawartość zostanie skasowana.";
 $langSetup["scriptdesc2"] = "Następnie skrypt poprosi o utworzenie konta do logowania w aplikacji µlogger.";
 $langSetup["startbutton"] = "Naciśnij, aby rozpocząć";
 $langSetup["restartbutton"] = "Uruchom ponownie";
diff --git a/scripts/migrate_from_phptrackme.php b/scripts/migrate_from_phptrackme.php
index e20388f..f23cd2d 100644
--- a/scripts/migrate_from_phptrackme.php
+++ b/scripts/migrate_from_phptrackme.php
@@ -80,6 +80,10 @@ if ($mysqli->connect_errno) {
   echo "Can't connect to $dbname database : (" . $mysqli->errno . ") " . $mysqli->error . "\n";
   exit(1);
 }
+$prefix = preg_replace('/[^a-z0-9_]/i', '', $dbprefix);
+$tPositions = $prefix . "positions";
+$tTracks = $prefix . "tracks";
+$tUsers = $prefix . "users";
 
 // import data
 if (!$users_result = $pt_mysqli->query("SELECT * FROM users ORDER BY ID")) {
@@ -87,7 +91,7 @@ if (!$users_result = $pt_mysqli->query("SELECT * FROM users ORDER BY ID")) {
   exit(1);
 }
 
-if (!($user_insert = $mysqli->prepare("INSERT INTO users (login, password) VALUES (?, ?)"))) {
+if (!($user_insert = $mysqli->prepare("INSERT INTO `$tUsers` (login, password) VALUES (?, ?)"))) {
   echo "Prepare failed: (" . $mysqli->errno . ") " . $mysqli->error . "\n";
   exit(1);
 }
@@ -142,7 +146,7 @@ function process_user_tracks($user_id) {
     exit(1);
   }
   $tracks_select->store_result();
-  if (!($track_insert = $mysqli->prepare("INSERT INTO tracks (user_id, name, comment) VALUES (?, ?, ?)"))) {
+  if (!($track_insert = $mysqli->prepare("INSERT INTO `$tTracks` (user_id, name, comment) VALUES (?, ?, ?)"))) {
     echo "Prepare failed: (" . $mysqli->errno . ") " . $mysqli->error . "\n";
     exit(1);
   }
@@ -190,7 +194,7 @@ function process_track($user_id, $old_id, $new_id) {
     exit(1);
   }
   $pos_select->store_result();
-  if (!($pos_insert = $mysqli->prepare("INSERT INTO positions (time, user_id, track_id, latitude, longitude, altitude, speed, bearing, accuracy, provider, comment, image_id)
+  if (!($pos_insert = $mysqli->prepare("INSERT INTO `$tPositions` (time, user_id, track_id, latitude, longitude, altitude, speed, bearing, accuracy, provider, comment, image_id)
                                         VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)"))) {
     echo "Prepare failed: (" . $mysqli->errno . ") " . $mysqli->error . "\n";
     exit(1);
diff --git a/scripts/setup.php b/scripts/setup.php
index bf1beed..a657c00 100644
--- a/scripts/setup.php
+++ b/scripts/setup.php
@@ -33,13 +33,18 @@ require_once(ROOT_DIR . "/lang.php");
 
 $command = isset($_REQUEST['command']) ? $_REQUEST['command'] : NULL;
 
+$prefix = preg_replace('/[^a-z0-9_]/i', '', $config::$dbprefix);
+$tPositions = $prefix . "positions";
+$tTracks = $prefix . "tracks";
+$tUsers = $prefix . "users";
+
 $messages = [];
 switch ($command) {
   case "setup":
     $queries = [];
     // positions
-    $queries[] = "DROP TABLE IF EXISTS `positions`";
-    $queries[] = "CREATE TABLE `positions` (
+    $queries[] = "DROP TABLE IF EXISTS `$tPositions`";
+    $queries[] = "CREATE TABLE `$tPositions` (
                     `id` int(11) NOT NULL AUTO_INCREMENT,
                     `time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
                     `user_id` int(11) NOT NULL,
@@ -59,8 +64,8 @@ switch ($command) {
                   ) ENGINE=InnoDB DEFAULT CHARSET=utf8";
 
     // tracks
-    $queries[] = "DROP TABLE IF EXISTS `tracks`";
-    $queries[] = "CREATE TABLE `tracks` (
+    $queries[] = "DROP TABLE IF EXISTS `$tTracks`";
+    $queries[] = "CREATE TABLE `$tTracks` (
                     `id` int(11) NOT NULL AUTO_INCREMENT,
                     `user_id` int(11) NOT NULL,
                     `name` varchar(255) DEFAULT NULL,
@@ -70,8 +75,8 @@ switch ($command) {
                   ) ENGINE=InnoDB DEFAULT CHARSET=utf8";
 
     // users
-    $queries[] = "DROP TABLE IF EXISTS `users`";
-    $queries[] = "CREATE TABLE `users` (
+    $queries[] = "DROP TABLE IF EXISTS `$tUsers`";
+    $queries[] = "CREATE TABLE `$tUsers` (
                     `id` int(11) NOT NULL AUTO_INCREMENT,
                     `login` varchar(15) CHARACTER SET latin1 NOT NULL,
                     `password` varchar(255) CHARACTER SET latin1 NOT NULL DEFAULT '',
@@ -160,7 +165,7 @@ switch ($command) {
       $messages[] = "<form method=\"post\" action=\"setup.php\"><button>{$langSetup["restartbutton"]}</button></form>";
       break;
     }
-    $messages[] = sprintf($langSetup["scriptdesc"], "<b>{$config::$dbname}</b>");
+    $messages[] = sprintf($langSetup["scriptdesc"], "'$tPositions', '$tTracks', '$tUsers'", "<b>{$config::$dbname}</b>");
     $messages[] = $langSetup["scriptdesc2"];
     $messages[] = "<form method=\"post\" action=\"setup.php\"><input type=\"hidden\" name=\"command\" value=\"setup\"><button>{$langSetup["startbutton"]}</button></form>";
     break;