Beep Test Leger

Simple, non-intrusive and highly accurate, the app follows either the original Leger protocol (1984) or the most popular alternative.
 
All you need is
        - a pair of running shoes
        - a flat 20 meter running pitch
        - a modicum of enthusiasm
        - this app

Note: this is NOT a GPS-enabled app; rather, it's a timer app that let's you easily conduct the beep test.

No ads, no tracking, no special permissions. It 
        - prompts you with beeps 
        - displays shuttle and level visual cues
        - displays distance covered and time elapsed
        - allows for a 15m or 20m lap
        - offers an auto stop feature

When you are done, the app will estimate your vo2Max

... that will
        - give you bragging rights (hopefully)
        - allow you to compare your fitness to that of the general population
        - allow you to chart your progress

Caution : Some side effects have been noticed
        - Runner's high. You will find yourself smiling far too much
        - Fitter. Regularly done, you will be able to 'run up those stairs'
        - Leaner. Darn, gotta buy smaller jeans!

Note: your result(s) will NOT be stored by the app; take a screenshot of the results page if you like.