I need a website monitoring service to make sure my app is not only up but also responsive.  Pingdom is great, but just so expensive.  Is there anything like it but more affordable?UPDATE: I'd like 1 minute interval checks at least. By responsive, I'd like to know stats on the response times of the individual checks and an SMS alert maybe if the responsive stays below a threshold for a certain amount of time.
Alternative to Pingdom website monitoring service
monitoring;analytics;load time;sms;downtime
https://uptimerobot.com/ offers a free plan with 5 minute interval checking, with one-minute interval checks on their paid plans.If you're really concerned with uptime you might also like to consider DNS hosting with a DNS failover service, which monitors your site every 2 to 4 minutes and updates your DNS to point to a backup server should it find that your primary server is down. Of course, this means you need to pay for a backup server, and that you need to mirror the content between the two servers.