Rootsu - is a free application for scanning root access on your device.
It provides detail check regarding root and also information's about the root.

Features:
★ One click root check
★ Root result 
★ Details root check
★ Device name
★ Device model
★ Root management apps
★ Potentially dangerous apps
★ Test keys
★ BusyBox binary
★ SuperUser binary
★ SuperUser exists
★ Read/write paths
★ Dangerous properties
★ Root native
★ Root cloaking apps
★ Futuristic UI

Note: This application does not root your device, it only verify if it is rooted or not!