I have been using siteuptime.com to monitor my websites for downtime. I find this service to be very useful because lately my site has been experiencing some downtime, so I might be switching hosts. With Site Uptime I can see exactly when my site goes down and comes back online. I can also configure it to send me an email when my site goes down or comes back up.
You can get a free account from Site Uptime that will test your site every 30 or 60 minutes and send you an email when it goes down and back up. For only a couple dollars a month, you can also receive detailed graphs and statistics on your site, as well as have your site checked up to every 5 minutes. With a free account you can track only one site, but with one of the paid accounts you can track more. You also get a lot of other features. I highly recommend getting a paid account because it’s cheap and has so many features.
This tool can save you a lot of money because if your website is down, you can’t make any money from it. Site Uptime will show you if this happens, and if it happens frequently you should maybe get a different host. So sign up with Site Uptime now!