Pingdom - With website monitoring from Pingdom you will be the first to know when your website is down. No installation required. 30-day free trial.
Huawei Mobile Services - Huawei Mobile Services app comes up with features to help you in accessing a large number of advanced features such as payments, push notifications, and Huawei ID, etc.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Samsung Flow - Android and Windows Apps.
Better Uptime - We call you when your website goes down
eWeLink - eWeLink – Smart Home app comes up with features to enable users to connect all their smart devices of various brands to integrate devices with smart speakers to control your home.