Coffee Meets Bagel, also known as CMB for short, is a new social networking and dating service based out of San Francisco. As of right now the company is in stealth mode, but expect to see more features added over time. The current version of the application uses an email system similar to Yahoo! 360's, but doesn't have as many of the other bells and whistles.
To get started you need to download the C MB software from their website. Once you have downloaded it, you can then login and begin using all of the features it has to offer. This particular software will work on any iPhone, iPod Touch, or any Android phone. The reason why this application is free is because the company is not making any profit off of the software, instead they are using it to develop customer relations and drive traffic. The hope is that with time this free software will become more prevalent in the market, and thus the company will be able to make a nice profit off of it.
With a free download you are also getting a free trial version of the application. If you decide to download it and try it out you will be able to find out if the phone is compatible with your iPhone before having to fork over any money. You can always purchase a more expensive iPhone version after you test it out.