We use Salesforce1 browser app using a secured browser(not Salesforce1 downloadable app from google play/apple store). I want to know how many users logged in today using SF1 - report/query. Any ideas would be greatly appreciated. Thanks.
You can use LoginHistory Object for Query and get all user logged in related information. Including the Browser name, Ip adrress, User Id etc.
There might be some cases like you login from computer and after that from your mobile in SF1. Now in login history it will display last login from SF1 whether you are querying from desktop as current browser. To handle this use IP address and filter record based on IP address and Id.