I've been using perfectaudience.com and found great success. It's very easy to use and the results have consistently been above average. It's Facebook specific but where are most people spending their time? Facebook.
I'd argue that adding "app" to your domain name *strengthens* your brand by making it more transparent and honest. It's accepted practice; see, for example, bufferapp.com and umergencyapp.com. "Try__.com," on the other hand, is less advisable: it sounds tentative and uncertain. For other URL o...
There are a number of ways you could go with this: Cost+: Close to what you are suggesting: Calculate your hourly cost, add a profit. Then define your projects with your client, and estimate number of hours of work. That would be your price - like craftspeople do it. The pro for this approach is...