diff --git a/public/static/css/mapguesser.css b/public/static/css/mapguesser.css
index 91a1374..b016fb5 100644
--- a/public/static/css/mapguesser.css
+++ b/public/static/css/mapguesser.css
@@ -84,7 +84,7 @@ hr {
 }
 
 p.small, span.small {
-    font-size: 12px;
+    font-size: 14px;
 }
 
 .justify {
@@ -148,6 +148,13 @@ button, a.button {
     line-height: 35px;
 }
 
+button.small {
+    font-size: 14px;
+    padding: 0 12px;
+    height: 32px;
+    line-height: 32px;
+}
+
 button:enabled:hover, button:enabled:focus, a.button:hover, a.button:focus {
     background-color: #29457f;
     outline: none;
@@ -336,6 +343,12 @@ div.buttonContainer>button {
     margin: 0 auto;
 }
 
+#cookiesNotice {
+    background-color: #eeeeee;
+    padding: 10px;
+    text-align: center;
+}
+
 #loading {
     position: fixed;
     width: 64px;
diff --git a/views/templates/main_footer.php b/views/templates/main_footer.php
index bb36eb7..cbb8457 100644
--- a/views/templates/main_footer.php
+++ b/views/templates/main_footer.php
@@ -14,5 +14,30 @@
             <script src="<?= $jsFile ?>"></script>
         <?php endforeach; ?>
     <?php endif; ?>
+    <?php if (!isset($_COOKIE['COOKIES_CONSENT'])): ?>
+        <script>
+            (function () {
+                MapGuesser = {
+                    cookiesAgreed: false,
+
+                    agreeCookies: function () {
+                        if (MapGuesser.cookiesAgreed) {
+                            return;
+                        }
+
+                        var expirationDate = new Date(new Date().getTime() + 20 * 365 * 24 * 60 * 60 * 1000).toUTCString();
+                        document.cookie = 'COOKIES_CONSENT=1; expires=' + expirationDate + '; path=/';
+
+                        MapGuesser.cookiesAgreed = true;
+                        document.getElementById('cookiesNotice').style.display = 'none';
+                    }
+                };
+
+                window.onclick = function () {
+                    MapGuesser.agreeCookies();
+                };
+            })();
+        </script>
+    <?php endif; ?>
 </body>
 </html>
\ No newline at end of file
diff --git a/views/templates/main_header.php b/views/templates/main_header.php
index b27c91e..ccfa6f3 100644
--- a/views/templates/main_header.php
+++ b/views/templates/main_header.php
@@ -22,6 +22,14 @@
     <link rel="icon" type="image/png" sizes="16x16" href="<?= $_ENV['STATIC_ROOT'] ?>/img/favicon/16x16.png?rev=<?= REVISION ?>">
 </head>
 <body>
+    <?php if (!isset($_COOKIE['COOKIES_CONSENT'])): ?>
+        <div id="cookiesNotice">
+            <p class="small">
+                <?= $_ENV['APP_NAME'] ?> uses cookies to improve user experience. By using the app or clicking I agree, you consent to our use of cookies.
+            </p>
+            <button id="agreeCookies" class="small marginTop">I agree</button>
+        </div>
+    <?php endif; ?>
     <div id="loading">
         <img src="<?= $_ENV['STATIC_ROOT'] ?>/img/loading.svg?rev=<?= REVISION ?>" width="64" height="64">
     </div>
diff --git a/web.php b/web.php
index bb911e1..279ac51 100644
--- a/web.php
+++ b/web.php
@@ -49,15 +49,19 @@ Container::$routeCollection->group('admin', function (MapGuesser\Routing\RouteCo
     $routeCollection->post('admin.deleteMap', 'deleteMap/{mapId}', [MapGuesser\Controller\MapAdminController::class, 'deleteMap']);
 });
 
-Container::$sessionHandler = new MapGuesser\Session\DatabaseSessionHandler();
+if (isset($_COOKIE['COOKIES_CONSENT'])) {
+    Container::$sessionHandler = new MapGuesser\Session\DatabaseSessionHandler();
 
-session_set_save_handler(Container::$sessionHandler, true);
-session_start([
-    'gc_maxlifetime' => 604800,
-    'cookie_lifetime' => 604800,
-    'cookie_httponly' => true,
-    'cookie_samesite' => 'Lax'
-]);
+    session_set_save_handler(Container::$sessionHandler, true);
+    session_start([
+        'gc_maxlifetime' => 604800,
+        'cookie_lifetime' => 604800,
+        'cookie_httponly' => true,
+        'cookie_samesite' => 'Lax'
+    ]);
+} else {
+    $_SESSION = [];
+}
 
 Container::$request = new MapGuesser\Request\Request($_SERVER['REQUEST_SCHEME'] . '://' . $_SERVER['HTTP_HOST'], $_GET, $_POST, $_SESSION);
 
