There is many sites/apps on internet from which we can earn money online by completing some task like completing surveys, viewing adds, listen music etc.Inbox Dollar basically from one of them, it is trusted site, it also have its own android app .Inbox dollar provides surveys to you and you need to complete that survey after completion of the survey
you will get your dollar by Inbox Dollar.It also provides other task too like to see adds by clicking on link given in mail of Inbox Dollar account of your.
Service of Inbox Dollar is reliable and good but they gives less opportunity means in initial you will get very less surveys to complete that is only problem comes with Inbox Dollar but Inbox Dollar gives some cents for daily login too after month and analysis of your activeness on your account according to that if you are active then it starts to give good number of surveys to you.
So due to less surveys in initially this is a fault of Inbox Dollar only.