Hey guys, not sure where's best to post this, but here seems good seeing as I'm deal hunting.

Just after recommendations on a tool/site/app (android) to monitor site changes ie price drops, additional listings on search results etc.

Something that emails or notifies a smartphone would be best.
Checking once an hour seems frequent enough but flexibility is always useful.

There seem to be heaps out there
so I was wondering what you guys use, if any.

Cheers, Sadler