There's an app for everything! Even for measuring the inflation pressure of your soccer ball.
The app promises to measure pressure in PSI and BAR without a gauge, simply by analyzing the ball's bounces, filmed by the smartphone's camera.
The application shows the balloon pressure on a 5-level scale from "under-inflated" to "over-inflated".
Learn more: https://itunes.apple.com/us/app/balltune/id873408114?mt=8