Ostorlab - Ostorlab scans your web or mobile application and provides results showing threats and privacy issues.
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.
App-Ray - App-Ray provides a cutting-edge solution for you to conduct a system-wide analysis and detect vulnerabilities in your mobile applications.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Traced for Android - Traced is a free cybersecurity app for Android. It detects suspicious activity from apps and unsecured Wi-Fi connections that might be used to spy on you or invade your privacy.
Better Uptime - We call you when your website goes down