http://www.TrendsFormer.co took me 3-4 days.

I created the site as a hobby project to show the trend of something over time, starting with restaurants/locations from Google Places and Yelp.

It started as an idea after I had a really bad quality food and service from a restaurant rated 4 out of 5. So with TrendsFormer, I'll be able to see whether the restaurant's quality has gone down over time through a "trend line".