Yelp clone that only populates results of businesses open at time of use

Hello, I am looking to develop a Yelp clone app that only populates results of businesses that are still or currently open at time of use. I have been quoted by Crowdvox that they can make said modifications to a Yelp clone app for $2300 (covering both Android and IOS). Is this reasonable? Are they reputable? Is that a difficult modification to write? (i.e. is it worth $2300). They offer clones for both operating systems for $350 each, that includes directories. Any info would help. Thank you. Cary

What does any of that have to do with Ruby on Rails?