diff --git a/.gitignore b/.gitignore
index de380d992bb..ed7da3d2ab2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -24,6 +24,7 @@
 !/apps/sharebymail
 !/apps/encryption
 !/apps/files_external
+!/apps/files_reminders
 !/apps/files_sharing
 !/apps/files_trashbin
 !/apps/files_versions
diff --git a/apps/files_reminders/lib/Db/Reminder.php b/apps/files_reminders/lib/Db/Reminder.php
new file mode 100644
index 00000000000..98e2cc5838f
--- /dev/null
+++ b/apps/files_reminders/lib/Db/Reminder.php
@@ -0,0 +1,56 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright 2023 Christopher Ng <chrng8@gmail.com>
+ *
+ * @author Christopher Ng <chrng8@gmail.com>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCA\FilesReminders\Db;
+
+use OCP\AppFramework\Db\Entity;
+
+/**
+ * @method void setUserId(string $userId)
+ * @method string getUserId()
+ *
+ * @method void setFileId(int $fileId)
+ * @method int getFileId()
+ *
+ * @method void setRemindAt(int $remindAt)
+ * @method int getRemindAt()
+ *
+ * @method void setNotified(bool $notified)
+ * @method bool getNotified()
+ */
+class Reminder extends Entity {
+	protected string $userId;
+	protected int $fileId;
+	protected int $remindAt;
+	protected bool $notified = false;
+
+	public function __construct() {
+		$this->addType('userId', 'string');
+		$this->addType('fileId', 'integer');
+		$this->addType('remindAt', 'integer');
+		$this->addType('notified', 'boolean');
+	}
+}
diff --git a/apps/files_reminders/lib/Db/ReminderMapper.php b/apps/files_reminders/lib/Db/ReminderMapper.php
new file mode 100644
index 00000000000..974416245fa
--- /dev/null
+++ b/apps/files_reminders/lib/Db/ReminderMapper.php
@@ -0,0 +1,67 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright 2023 Christopher Ng <chrng8@gmail.com>
+ *
+ * @author Christopher Ng <chrng8@gmail.com>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCA\FilesReminders\Db;
+
+use OCP\AppFramework\Db\QBMapper;
+use OCP\DB\QueryBuilder\IQueryBuilder;
+use OCP\IDBConnection;
+
+/**
+ * @template-extends QBMapper<Reminder>
+ */
+class ReminderMapper extends QBMapper {
+	public const TABLE_NAME = 'files_reminders';
+
+	public function __construct(IDBConnection $db) {
+		parent::__construct(
+			$db,
+			static::TABLE_NAME,
+			Reminder::class,
+		);
+	}
+
+	public function markNotified(Reminder $reminder): Reminder {
+		$reminderUpdate = new Reminder();
+		$reminderUpdate->setId($reminder->getId());
+		$reminderUpdate->setNotified(true);
+		return parent::update($reminderUpdate);
+	}
+
+	/**
+	 * @return Reminder[]
+	 */
+	public function findToRemind() {
+		$qb = $this->db->getQueryBuilder();
+
+		$qb->select('user_id', 'file_id', 'remind_at')
+			->from($this->getTableName())
+			->where($qb->expr()->lt('remind_at', $qb->createFunction('NOW()')))
+			->andWhere($qb->expr()->eq('notified', $qb->createNamedParameter(false, IQueryBuilder::PARAM_BOOL)));
+
+		return $this->findEntities($qb);
+	}
+}
diff --git a/apps/files_reminders/lib/Migration/Version10000Date20230725162149.php b/apps/files_reminders/lib/Migration/Version10000Date20230725162149.php
new file mode 100644
index 00000000000..ab0afd5aec6
--- /dev/null
+++ b/apps/files_reminders/lib/Migration/Version10000Date20230725162149.php
@@ -0,0 +1,71 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright 2023 Christopher Ng <chrng8@gmail.com>
+ *
+ * @author Christopher Ng <chrng8@gmail.com>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCA\FilesReminders\Migration;
+
+use Closure;
+use OCA\FilesReminders\Db\ReminderMapper;
+use OCP\DB\ISchemaWrapper;
+use OCP\DB\Types;
+use OCP\Migration\IOutput;
+use OCP\Migration\SimpleMigrationStep;
+
+class Version10000Date20230725162149 extends SimpleMigrationStep {
+	/**
+	 * @param Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
+	 */
+	public function changeSchema(IOutput $output, Closure $schemaClosure, array $options): ?ISchemaWrapper {
+		/** @var ISchemaWrapper $schema */
+		$schema = $schemaClosure();
+
+		$table = $schema->createTable(ReminderMapper::TABLE_NAME);
+		$table->addColumn('id', Types::BIGINT, [
+			'autoincrement' => true,
+			'notnull' => true,
+			'length' => 20,
+			'unsigned' => true,
+		]);
+		$table->addColumn('user_id', Types::STRING, [
+			'notnull' => true,
+			'length' => 64,
+		]);
+		$table->addColumn('file_id', Types::BIGINT, [
+			'notnull' => true,
+			'length' => 20,
+		]);
+		$table->addColumn('remind_at', Types::BIGINT, [
+			'notnull' => true,
+		]);
+		$table->addColumn('notified', Types::BOOLEAN, [
+			'notnull' => false,
+			'default' => false,
+		]);
+		$table->setPrimaryKey(['id']);
+		$table->addUniqueIndex(['user_id', 'file_id', 'remind_at'], 'reminders_uniq_idx');
+
+		return $schema;
+	}
+}