Scrumvee

Complete Scrum poker estimation tool, featuring a mobile app and a browser platform, now integrated with JIRA! Each developer selects the Scrum estimation from its own smartphone, without interfering and potentially affecting other team members. The ScrumMaster can easily see all the estimations.
You can see how many of your teammates estimated correctly and how often. Easily spot poorly defined stories or team members which are constantly over or under estimating.