diff --git a/README.md b/README.md
index 7ebfe9d..ec3e096 100644
--- a/README.md
+++ b/README.md
@@ -36,6 +36,8 @@ Its original purpose was to serve as a demo and test for the KD2 WebDAV library,
 
 ### NextCloud/ownCloud features
 
+KaraDAV is compatible with ownCloud and NextCloud clients, because on Android there is not much nice WebDAV clients, and on desktop their clients allow for two-way sync, which no other WebDAV client provides.
+
 The following ownCloud/NextCloud specific features are supported:
 
 * [Direct download](https://docs.nextcloud.com/server/latest/developer_manual/client_apis/OCS/ocs-api-overview.html#direct-download)
diff --git a/lib/KD2/WebDAV/AbstractStorage.php b/lib/KD2/WebDAV/AbstractStorage.php
index a5c1df9..088b7a4 100644
--- a/lib/KD2/WebDAV/AbstractStorage.php
+++ b/lib/KD2/WebDAV/AbstractStorage.php
@@ -105,7 +105,9 @@ abstract class AbstractStorage
 	 * @param  array $properties List of properties requested by client (see ::properties)
 	 * @return iterable An array or other iterable (eg. a generator)
 	 * where each item has a key string containing the name of the resource (eg. file name),
-	 * and the value being an array of properties, or NULL
+	 * and the value being an array of properties, or NULL.
+	 *
+	 * If the array value IS NULL, then a subsequent call to properties() will be issued for each element.
 	 */
 	abstract public function list(string $uri, array $properties): iterable;
 
diff --git a/lib/KD2/WebDAV/Server.php b/lib/KD2/WebDAV/Server.php
index e462143..f519cce 100644
--- a/lib/KD2/WebDAV/Server.php
+++ b/lib/KD2/WebDAV/Server.php
@@ -742,6 +742,14 @@ class Server
 				$alias = $root_namespaces[$ns] ?? null;
 				$attributes = '';
 
+				// The ownCloud Android app doesn't like formatted dates, it makes it crash.
+				// so force it to have a timestamp
+				if ($name == 'DAV::creationdate'
+					&& ($value instanceof \DateTimeInterface)
+					&& false !== stripos($_SERVER['HTTP_USER_AGENT'] ?? '', 'owncloud')) {
+					$value = $value->getTimestamp();
+				}
+
 				if ($name == 'DAV::resourcetype' && $value == 'collection') {
 					$value = '<d:collection />';
 				}
diff --git a/lib/KaraDAV/Storage.php b/lib/KaraDAV/Storage.php
index 2b59533..dab785a 100644
--- a/lib/KaraDAV/Storage.php
+++ b/lib/KaraDAV/Storage.php
@@ -3,7 +3,6 @@
 namespace KaraDAV;
 
 use KD2\WebDAV\AbstractStorage;
-use KD2\WebDAV\Server as WebDAV_Server;
 use KD2\WebDAV\WOPI;
 use KD2\WebDAV\Exception as WebDAV_Exception;
 
@@ -130,11 +129,6 @@ class Storage extends AbstractStorage
 			case 'DAV::lastaccessed':
 				return new \DateTime('@' . fileatime($target));
 			case 'DAV::creationdate':
-				// The ownCloud Android app doesn't like formatted dates, it makes it crash.
-				if (false !== stripos($_SERVER['HTTP_USER_AGENT'] ?? '', 'owncloud')) {
-					return filectime($target);
-				}
-
 				return new \DateTime('@' . filectime($target));
 			case WebDAV::PROP_DIGEST_MD5:
 				if (!is_file($target)) {