セキュリティカメラ - ホームモニター：古いiPhoneをプライベートでサブスクリプション不要の監視システムに

With the Security Camera app, you can monitor your home by watching a live video stream on any other device connected to the same Wi-Fi network, using only a web browser. * This is a unique approach that many users appreciated * ** How it works: The app captures video, generates a live stream and runs an http web server. The app displays the web address or URL of the live stream page. The URL contains the IP address of the iPhone on which the app runs (the private IP inside your home network, can not be seen from Internet). All you need to do is just to open a web browser on your computer, another smartphone or tablet, navigate to the page and start watching. Internet connection is not required, only home Wi-Fi is used.