Information about sessions (when users open and close the app) is very important, because the biggest part of integration is based on it. Sessions allow to calculate such metrics as audience (DAU, WAU, MAU), users online, retention, average session length, etc. Along with sessions, information about payments is essential. When devtodev receives data about sessions and payments in your app, it can calculate all financial metrics (gross, revenue, average check) and metrics of project’s financial efficiency (ARPU, ARPPU, paying share, LTV).