at your fingertips
readily available for you to use or reach
All basic controls are at your fingertips for straightforward, no fuss operation.
if you have facts or information at your fingertips, you know them thoroughly and can refer to them quickly
He wanted to know all about his latest projects, so that the correct answers were at his fingertips when he was questioned by the right people.
Easy Learning Idioms Dictionary. Copyright © HarperCollins Publishers