Autify for Mobile - Autify for Mobile is a no-code testing platform.
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.
Monkop - Mobile testing cloud
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Waldo for Android - No-code mobile testing that works
Better Uptime - We call you when your website goes down