Use the buttons at the top to add dice to your pool. They will be automatically rolled and added to your total.
Each button in the bottom container is a die in your dice pool, displaying its most recent result and its die type. Use the buttons in your pool to reroll these dice, or re-roll all the dice in the pool at once with the big button that says so.
Clear out your dice pool with the big button that says so.
Using the input box inside the description of your dice pool, you can add a modifier to your total that will persist across rolls, but reset when you clear your dice pool.
Turning suspenseful rolls on or off won't affect the outcomes, but it might feel like it.
My thanks to Glyphicons for making their library free with Bootstrap.