See a Summary for predefined periods and also load a summary for a custom period. See breakdowns in 'Earnings' and see a list of offers available to promote under 'Offers'
You can register for free here to join WOW Trk if you have not already done so: http://p.wowtrk.com/signup (you will be approved instantly if you verify your phone number!).
Once you sign up or login you can get your API key from under 'Tools' and then 'APIs'. You will need this to login.
WOW Trk has over 300 offers and pays out per conversion. Conversions can be from simply registering at a website for free or make a deposit on a gambling website. Payments can be sent to you via PayPal, Payoneer, Check and Bank Transfer.
Reporting on WOW Trk is instant, so you can easily see how much you are making.