For basic app stats like no of reviews per day, and reviews compared from t , (t-1) to (t-30) use this app called > app stats. Its a great way to understand what's happening with the app in general. But other information like daily installs/uninstalls can only be got from the dashboard. Ask the client to use this app, and send a weekly report of the other numbers if you don't want to share access of the developer console.