diff --git a/mod/item.php b/mod/item.php
index f184186e16..decb957bcc 100644
--- a/mod/item.php
+++ b/mod/item.php
@@ -284,7 +284,7 @@ function item_process(array $post, array $request, bool $preview, string $return
 	unset($post['api_source']);
 
 	if (!empty($request['scheduled_at'])) {
-		$scheduled_at = DateTimeFormat::convert($request['scheduled_at'], 'UTC', DI::apphelper()->getTimeZone());
+		$scheduled_at = DateTimeFormat::convert($request['scheduled_at'], 'UTC', DI::appHelper()->getTimeZone());
 		if ($scheduled_at > DateTimeFormat::utcNow()) {
 			unset($post['created']);
 			unset($post['edited']);
diff --git a/src/App.php b/src/App.php
index c5a7990994..46639f8939 100644
--- a/src/App.php
+++ b/src/App.php
@@ -129,7 +129,7 @@ class App implements AppHelper
 		$this->l10n      = $l10n;
 		$this->args      = $args;
 		$this->session   = $session;
-		$this->appHelper = DI::apphelper();
+		$this->appHelper = DI::appHelper();
 
 		$this->load($dbaDefinition, $viewDefinition);
 	}
diff --git a/src/Console/PostUpdate.php b/src/Console/PostUpdate.php
index 2d0357a460..318712cdc5 100644
--- a/src/Console/PostUpdate.php
+++ b/src/Console/PostUpdate.php
@@ -58,7 +58,7 @@ HELP;
 		$this->appMode  = $appMode;
 		$this->keyValue = $keyValue;
 		$this->l10n     = $l10n;
-		$this->basePath = DI::apphelper()->getBasePath();
+		$this->basePath = DI::appHelper()->getBasePath();
 	}
 
 	protected function doExecute(): int
diff --git a/src/Content/OEmbed.php b/src/Content/OEmbed.php
index 55f5e0ad0f..4d3c589041 100644
--- a/src/Content/OEmbed.php
+++ b/src/Content/OEmbed.php
@@ -48,7 +48,7 @@ class OEmbed
 	{
 		$embedurl = trim($embedurl, '\'"');
 
-		$appHelper = DI::apphelper();
+		$appHelper = DI::appHelper();
 
 		$cache_key = 'oembed:' . $appHelper->getThemeInfoValue('videowidth') . ':' . $embedurl;
 
diff --git a/src/Content/Text/BBCode.php b/src/Content/Text/BBCode.php
index 238bac1205..bcac088e7e 100644
--- a/src/Content/Text/BBCode.php
+++ b/src/Content/Text/BBCode.php
@@ -1926,7 +1926,7 @@ class BBCode
 
 	private static function convertVideoPlatformsToHtml(string $text, bool $try_oembed): string
 	{
-		$appHelper = DI::apphelper();
+		$appHelper = DI::appHelper();
 
 		$text = self::normalizeVideoLinks($text);
 
diff --git a/src/Core/Hook.php b/src/Core/Hook.php
index bbf634401a..44dfad70bc 100644
--- a/src/Core/Hook.php
+++ b/src/Core/Hook.php
@@ -80,7 +80,7 @@ class Hook
 	 */
 	public static function register(string $hook, string $file, string $function, int $priority = 0)
 	{
-		$file = str_replace(DI::apphelper()->getBasePath() . DIRECTORY_SEPARATOR, '', $file);
+		$file = str_replace(DI::appHelper()->getBasePath() . DIRECTORY_SEPARATOR, '', $file);
 
 		$condition = ['hook' => $hook, 'file' => $file, 'function' => $function];
 		if (DBA::exists('hook', $condition)) {
@@ -101,7 +101,7 @@ class Hook
 	 */
 	public static function unregister(string $hook, string $file, string $function): bool
 	{
-		$relative_file = str_replace(DI::apphelper()->getBasePath() . DIRECTORY_SEPARATOR, '', $file);
+		$relative_file = str_replace(DI::appHelper()->getBasePath() . DIRECTORY_SEPARATOR, '', $file);
 
 		// This here is only needed for fixing a problem that existed on the develop branch
 		$condition = ['hook' => $hook, 'file' => $file, 'function' => $function];
@@ -197,7 +197,7 @@ class Hook
 	public static function callSingle(string $name, array $hook, &$data = null)
 	{
 		// Don't run a theme's hook if the user isn't using the theme
-		if (strpos($hook[0], 'view/theme/') !== false && strpos($hook[0], 'view/theme/' . DI::apphelper()->getCurrentTheme()) === false) {
+		if (strpos($hook[0], 'view/theme/') !== false && strpos($hook[0], 'view/theme/' . DI::appHelper()->getCurrentTheme()) === false) {
 			return;
 		}
 
diff --git a/src/Core/Renderer.php b/src/Core/Renderer.php
index 6ddd8d4ad1..6fb6e02ead 100644
--- a/src/Core/Renderer.php
+++ b/src/Core/Renderer.php
@@ -155,7 +155,7 @@ class Renderer
 			if (isset(self::$template_engine_instance[$template_engine])) {
 				return self::$template_engine_instance[$template_engine];
 			} else {
-				$appHelper = DI::apphelper();
+				$appHelper = DI::appHelper();
 				$class = self::$template_engines[$template_engine];
 				$obj = new $class($appHelper->getCurrentTheme(), $appHelper->getThemeInfo());
 				self::$template_engine_instance[$template_engine] = $obj;
diff --git a/src/Core/Theme.php b/src/Core/Theme.php
index 81d1016831..eedc64e066 100644
--- a/src/Core/Theme.php
+++ b/src/Core/Theme.php
@@ -208,7 +208,7 @@ class Theme
 	 */
 	public static function getPathForFile(string $file): string
 	{
-		$appHelper = DI::apphelper();
+		$appHelper = DI::appHelper();
 
 		$theme = $appHelper->getCurrentTheme();
 
@@ -245,7 +245,7 @@ class Theme
 			return 'view/theme/' . $theme . '/style.css';
 		}
 
-		$appHelper = DI::apphelper();
+		$appHelper = DI::appHelper();
 
 		$query_params = [];
 
@@ -267,7 +267,7 @@ class Theme
 	{
 		$theme = Strings::sanitizeFilePathItem($theme);
 
-		$appHelper = DI::apphelper();
+		$appHelper = DI::appHelper();
 		$base_theme = $appHelper->getThemeInfoValue('extends') ?? '';
 
 		if (file_exists("view/theme/$theme/config.php")) {
diff --git a/src/Core/Worker.php b/src/Core/Worker.php
index 6aa8d4331d..5d33dc57fe 100644
--- a/src/Core/Worker.php
+++ b/src/Core/Worker.php
@@ -533,7 +533,7 @@ class Worker
 	 */
 	private static function execFunction(array $queue, string $funcname, array $argv, bool $method_call)
 	{
-		$appHelper = DI::apphelper();
+		$appHelper = DI::appHelper();
 
 		self::coolDown();
 
@@ -1371,7 +1371,7 @@ class Worker
 	 */
 	public static function getRetrial(): int
 	{
-		$queue = DI::apphelper()->getQueue();
+		$queue = DI::appHelper()->getQueue();
 		return $queue['retrial'] ?? 0;
 	}
 
@@ -1384,7 +1384,7 @@ class Worker
 	 */
 	public static function defer(int $worker_defer_limit = 0): bool
 	{
-		$queue = DI::apphelper()->getQueue();
+		$queue = DI::appHelper()->getQueue();
 
 		if (empty($queue)) {
 			return false;
diff --git a/src/DI.php b/src/DI.php
index 8f5c9859e5..5604fe9df2 100644
--- a/src/DI.php
+++ b/src/DI.php
@@ -71,7 +71,7 @@ abstract class DI
 	//
 
 	/**
-	 * @deprecated 2024.12 use DI::apphelper() instead
+	 * @deprecated 2024.12 use DI::appHelper() instead
 	 *
 	 * @return App
 	 */
@@ -80,7 +80,7 @@ abstract class DI
 		return self::$dice->create(App::class);
 	}
 
-	public static function apphelper(): AppHelper
+	public static function appHelper(): AppHelper
 	{
 		return self::$dice->create(AppHelper::class);
 	}
diff --git a/src/Model/Item.php b/src/Model/Item.php
index b0b4d80d19..ffdb9c67f0 100644
--- a/src/Model/Item.php
+++ b/src/Model/Item.php
@@ -3348,7 +3348,7 @@ class Item
 	 */
 	public static function prepareBody(array &$item, bool $attach = false, bool $is_preview = false, bool $only_cache = false): string
 	{
-		$appHelper = DI::apphelper();
+		$appHelper = DI::appHelper();
 		$uid = DI::userSession()->getLocalUserId();
 		Hook::callAll('prepare_body_init', $item);
 
diff --git a/src/Module/Admin/Summary.php b/src/Module/Admin/Summary.php
index a586b117da..736c8b3e2e 100644
--- a/src/Module/Admin/Summary.php
+++ b/src/Module/Admin/Summary.php
@@ -29,7 +29,7 @@ class Summary extends BaseAdmin
 	{
 		parent::content();
 
-		$basePath = DI::apphelper()->getBasePath();
+		$basePath = DI::appHelper()->getBasePath();
 
 		// are there MyISAM tables in the DB? If so, trigger a warning message
 		$warningtext = [];
diff --git a/src/Module/Api/Friendica/Events/Create.php b/src/Module/Api/Friendica/Events/Create.php
index fdde2e9c18..3766fa1fbe 100644
--- a/src/Module/Api/Friendica/Events/Create.php
+++ b/src/Module/Api/Friendica/Events/Create.php
@@ -59,11 +59,11 @@ class Create extends BaseApi
 			$finish   = DBA::NULL_DATETIME;
 			$nofinish = true;
 		} else {
-			$finish   = DateTimeFormat::convert($request['end_time'], 'UTC', DI::apphelper()->getTimeZone());
+			$finish   = DateTimeFormat::convert($request['end_time'], 'UTC', DI::appHelper()->getTimeZone());
 			$nofinish = false;
 		}
 
-		$start = DateTimeFormat::convert($request['start_time'], 'UTC', DI::apphelper()->getTimeZone());
+		$start = DateTimeFormat::convert($request['start_time'], 'UTC', DI::appHelper()->getTimeZone());
 
 		// create event
 		$event = [];
diff --git a/src/Module/Home.php b/src/Module/Home.php
index 94cb08773e..9c72398f7a 100644
--- a/src/Module/Home.php
+++ b/src/Module/Home.php
@@ -32,7 +32,7 @@ class Home extends BaseModule
 
 	protected function content(array $request = []): string
 	{
-		$basePath = DI::apphelper()->getBasePath();
+		$basePath = DI::appHelper()->getBasePath();
 		$config = DI::config();
 
 		// currently no returned data is used
diff --git a/src/Module/OAuth/Acknowledge.php b/src/Module/OAuth/Acknowledge.php
index 82ad166bc9..78e4083e42 100644
--- a/src/Module/OAuth/Acknowledge.php
+++ b/src/Module/OAuth/Acknowledge.php
@@ -26,7 +26,7 @@ class Acknowledge extends BaseApi
 	protected function post(array $request = [])
 	{
 		DI::session()->set('oauth_acknowledge', true);
-		DI::apphelper()->redirect(DI::session()->get('return_path'));
+		DI::appHelper()->redirect(DI::session()->get('return_path'));
 	}
 
 	protected function content(array $request = []): string
diff --git a/src/Module/OAuth/Authorize.php b/src/Module/OAuth/Authorize.php
index 8d77573e72..8179bfa886 100644
--- a/src/Module/OAuth/Authorize.php
+++ b/src/Module/OAuth/Authorize.php
@@ -60,14 +60,14 @@ class Authorize extends BaseApi
 		$uid = DI::userSession()->getLocalUserId();
 		if (empty($uid)) {
 			Logger::info('Redirect to login');
-			DI::apphelper()->redirect('login?' . http_build_query(['return_authorize' => $redirect]));
+			DI::appHelper()->redirect('login?' . http_build_query(['return_authorize' => $redirect]));
 		} else {
 			Logger::info('Already logged in user', ['uid' => $uid]);
 		}
 
 		if (!OAuth::existsTokenForUser($application, $uid) && !DI::session()->get('oauth_acknowledge')) {
 			Logger::info('Redirect to acknowledge');
-			DI::apphelper()->redirect('oauth/acknowledge?' . http_build_query(['return_authorize' => $redirect, 'application' => $application['name']]));
+			DI::appHelper()->redirect('oauth/acknowledge?' . http_build_query(['return_authorize' => $redirect, 'application' => $application['name']]));
 		}
 
 		DI::session()->remove('oauth_acknowledge');
@@ -78,7 +78,7 @@ class Authorize extends BaseApi
 		}
 
 		if ($application['redirect_uri'] != 'urn:ietf:wg:oauth:2.0:oob') {
-			DI::apphelper()->redirect($request['redirect_uri'] . (strpos($request['redirect_uri'], '?') ? '&' : '?') . http_build_query(['code' => $token['code'], 'state' => $request['state']]));
+			DI::appHelper()->redirect($request['redirect_uri'] . (strpos($request['redirect_uri'], '?') ? '&' : '?') . http_build_query(['code' => $token['code'], 'state' => $request['state']]));
 		}
 
 		self::$oauth_code = $token['code'];
diff --git a/src/Module/RandomProfile.php b/src/Module/RandomProfile.php
index d590af634f..bc43d48511 100644
--- a/src/Module/RandomProfile.php
+++ b/src/Module/RandomProfile.php
@@ -18,7 +18,7 @@ class RandomProfile extends BaseModule
 {
 	protected function content(array $request = []): string
 	{
-		$appHelper = DI::apphelper();
+		$appHelper = DI::appHelper();
 
 		$contact = Contact::getRandomContact();
 
diff --git a/src/Module/Settings/Account.php b/src/Module/Settings/Account.php
index 6c8a473470..3046e28775 100644
--- a/src/Module/Settings/Account.php
+++ b/src/Module/Settings/Account.php
@@ -109,7 +109,7 @@ class Account extends BaseSettings
 			}
 
 			if (strlen($timezone) && $timezone != $user['timezone']) {
-				DI::apphelper()->setTimeZone($timezone);
+				DI::appHelper()->setTimeZone($timezone);
 			}
 
 			$fields = [
@@ -400,7 +400,7 @@ class Account extends BaseSettings
 		$expire_network_only = DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'expire', 'network_only', false);
 
 		if (!strlen($user['timezone'])) {
-			$timezone = DI::apphelper()->getTimeZone();
+			$timezone = DI::appHelper()->getTimeZone();
 		}
 
 		// Set the account type to "Community" when the page is a community page but the account type doesn't fit
diff --git a/src/Module/Update/Profile.php b/src/Module/Update/Profile.php
index bcfce3fa38..b9360d7360 100644
--- a/src/Module/Update/Profile.php
+++ b/src/Module/Update/Profile.php
@@ -23,7 +23,7 @@ class Profile extends BaseModule
 {
 	protected function rawContent(array $request = [])
 	{
-		$appHelper = DI::apphelper();
+		$appHelper = DI::appHelper();
 
 		// Ensure we've got a profile owner if updating.
 		$appHelper->setProfileOwner((int)($request['p'] ?? 0));
diff --git a/src/Object/Thread.php b/src/Object/Thread.php
index e0585e3222..2363ab197d 100644
--- a/src/Object/Thread.php
+++ b/src/Object/Thread.php
@@ -57,7 +57,7 @@ class Thread
 			return;
 		}
 
-		$appHelper = DI::apphelper();
+		$appHelper = DI::appHelper();
 
 		switch ($mode) {
 			case Conversation::MODE_NETWORK:
diff --git a/src/Protocol/ActivityPub/Queue.php b/src/Protocol/ActivityPub/Queue.php
index 678decb1ca..059ba1a388 100644
--- a/src/Protocol/ActivityPub/Queue.php
+++ b/src/Protocol/ActivityPub/Queue.php
@@ -192,7 +192,7 @@ class Queue
 		}
 
 		if (!empty($entry['wid'])) {
-			$worker = DI::apphelper()->getQueue();
+			$worker = DI::appHelper()->getQueue();
 			$wid = $worker['id'] ?? 0;
 			if ($entry['wid'] != $wid) {
 				$workerqueue = DBA::selectFirst('workerqueue', ['pid'], ['id' => $entry['wid'], 'done' => false]);
diff --git a/src/Protocol/Feed.php b/src/Protocol/Feed.php
index 9800fd2433..62d58a0ec8 100644
--- a/src/Protocol/Feed.php
+++ b/src/Protocol/Feed.php
@@ -1014,7 +1014,7 @@ class Feed
 
 		// Display events in the user's timezone
 		if (strlen($owner['timezone'])) {
-			DI::apphelper()->setTimeZone($owner['timezone']);
+			DI::appHelper()->setTimeZone($owner['timezone']);
 		}
 
 		$previous_created = $last_update;
diff --git a/src/Security/OpenWebAuth.php b/src/Security/OpenWebAuth.php
index 79117c4ecc..4090fa7378 100644
--- a/src/Security/OpenWebAuth.php
+++ b/src/Security/OpenWebAuth.php
@@ -114,7 +114,7 @@ class OpenWebAuth
 	 */
 	public static function init(string $token)
 	{
-		$appHelper = DI::apphelper();
+		$appHelper = DI::appHelper();
 
 		// Clean old OpenWebAuthToken entries.
 		OpenWebAuthToken::purge('owt', '3 MINUTE');
@@ -160,7 +160,7 @@ class OpenWebAuth
 	 */
 	public static function addVisitorCookieForHandle(string $handle): array
 	{
-		$appHelper = DI::apphelper();
+		$appHelper = DI::appHelper();
 
 		// Try to find the public contact entry of the visitor.
 		$cid = Contact::getIdForURL($handle);
diff --git a/src/Util/Temporal.php b/src/Util/Temporal.php
index 64ab47b98c..098b60d5e8 100644
--- a/src/Util/Temporal.php
+++ b/src/Util/Temporal.php
@@ -264,7 +264,7 @@ class Temporal
 				$input_text,
 				DI::l10n()->t(
 					'Time zone: <strong>%s</strong> <a href="%s">Change in Settings</a>',
-					str_replace('_', ' ', DI::apphelper()->getTimeZone()) . ' (GMT ' . DateTimeFormat::localNow('P') . ')',
+					str_replace('_', ' ', DI::appHelper()->getTimeZone()) . ' (GMT ' . DateTimeFormat::localNow('P') . ')',
 					DI::baseUrl() . '/settings'
 				),
 				$required ? '*' : '',
diff --git a/src/Worker/Cron.php b/src/Worker/Cron.php
index e6d11db370..c10a548559 100644
--- a/src/Worker/Cron.php
+++ b/src/Worker/Cron.php
@@ -21,7 +21,7 @@ class Cron
 {
 	public static function execute()
 	{
-		$basepath = DI::apphelper()->getBasePath();
+		$basepath = DI::appHelper()->getBasePath();
 
 		$last = DI::keyValue()->get('last_cron');
 
diff --git a/src/Worker/DBUpdate.php b/src/Worker/DBUpdate.php
index 87a3fae27f..4e01e62898 100644
--- a/src/Worker/DBUpdate.php
+++ b/src/Worker/DBUpdate.php
@@ -19,7 +19,7 @@ class DBUpdate
 	{
 		// Just in case the last update wasn't failed
 		if (DI::config()->get('system', 'update', Update::SUCCESS) != Update::FAILED) {
-			Update::run(DI::apphelper()->getBasePath());
+			Update::run(DI::appHelper()->getBasePath());
 		}
 	}
 }
diff --git a/src/Worker/Expire.php b/src/Worker/Expire.php
index 2193791229..baaef454ff 100644
--- a/src/Worker/Expire.php
+++ b/src/Worker/Expire.php
@@ -21,7 +21,7 @@ class Expire
 {
 	public static function execute($param = '', $hook_function = '')
 	{
-		$appHelper = DI::apphelper();
+		$appHelper = DI::appHelper();
 
 		Hook::loadHooks();
 
diff --git a/src/Worker/FetchMissingActivity.php b/src/Worker/FetchMissingActivity.php
index 7224f85cdb..5b6e8ffd03 100644
--- a/src/Worker/FetchMissingActivity.php
+++ b/src/Worker/FetchMissingActivity.php
@@ -40,7 +40,7 @@ class FetchMissingActivity
 			Logger::info('Defer limit reached, activity could not be fetched', ['url' => $url]);
 
 			// recursively delete all entries that belong to this worker task
-			$queue = DI::apphelper()->getQueue();
+			$queue = DI::appHelper()->getQueue();
 			if (!empty($queue['id'])) {
 				Queue::deleteByWorkerId($queue['id']);
 			}
diff --git a/src/Worker/Notifier.php b/src/Worker/Notifier.php
index 90e47273de..42868e4e0e 100644
--- a/src/Worker/Notifier.php
+++ b/src/Worker/Notifier.php
@@ -42,7 +42,7 @@ class Notifier
 {
 	public static function execute(string $cmd, int $post_uriid, int $sender_uid = 0)
 	{
-		$appHelper = DI::apphelper();
+		$appHelper = DI::appHelper();
 
 		Logger::info('Invoked', ['cmd' => $cmd, 'target' => $post_uriid, 'sender_uid' => $sender_uid]);
 
@@ -414,7 +414,7 @@ class Notifier
 	 */
 	private static function delivery(string $cmd, int $post_uriid, int $sender_uid, array $target_item, array $parent, array $thr_parent, array $owner, bool $batch_delivery, bool $in_batch, array $contacts, array $ap_contacts, array $conversants = []): int
 	{
-		$appHelper = DI::apphelper();
+		$appHelper = DI::appHelper();
 		$delivery_queue_count = 0;
 
 		if (!empty($target_item['verb']) && ($target_item['verb'] == Activity::ANNOUNCE)) {
diff --git a/src/Worker/ProfileUpdate.php b/src/Worker/ProfileUpdate.php
index fb8ecfd857..685229b3b5 100644
--- a/src/Worker/ProfileUpdate.php
+++ b/src/Worker/ProfileUpdate.php
@@ -30,7 +30,7 @@ class ProfileUpdate {
 			return;
 		}
 
-		$appHelper = DI::apphelper();
+		$appHelper = DI::appHelper();
 
 		$inboxes = ActivityPub\Transmitter::fetchTargetInboxesforUser($uid);
 
diff --git a/view/theme/frio/php/scheme.php b/view/theme/frio/php/scheme.php
index b8547fee3d..5c11c8a5d1 100644
--- a/view/theme/frio/php/scheme.php
+++ b/view/theme/frio/php/scheme.php
@@ -29,7 +29,7 @@ require_once 'view/theme/frio/theme.php';
 
 function get_scheme_info($scheme)
 {
-	$theme = DI::apphelper()->getCurrentTheme();
+	$theme = DI::appHelper()->getCurrentTheme();
 	$themepath = 'view/theme/' . $theme . '/';
 	$scheme = Strings::sanitizeFilePathItem($scheme) ?: FRIO_DEFAULT_SCHEME;