Here is another website monitoring service which keeps checking your website if its down or up and reports you back with the results. Very much recommended service because you dont have to pay any $ for checking any of the following features.

website or blog dns responding properly?
website or blog network reachable?
website or blog server alive?
website or blog web site responding?
website or blog ssl certificate valid?
website or blog ad publisher working properly?
website or blog affiliate program alive?
website or blog payment gateway alive?

Features of Basic State :
* checks your website every 15 minutes
* get instant trouble alerts by email or sms
* anywhere, anytime
* unlimited sites

What kind of reports do you get? You should expect a non-graphical email with no HTML nor graphics with 1 single email for the whole days website uptime or downtime performance. The reports shows you the uptime in % for the past 7days in a row. You can also check out the uptime performance charts which are represented in bar graphs offering you with easy understanding of the total time your site was down in a monthly time. You need to compromise with these text email notifications because you are not paying any fees for this monitoring service , but still receiving timely reports on email or mobile phone sms.