If you're looking to Download Yoyo Test Pro on your Chromebook laptop Then read the following guideline.

A sophisticated app aimed at group testing and advanced individual testing. Please take some time to examine it -- do a few "dry" runs before going live with it. Yo-Yo Intermittent Pro is an enhanced version of the free Yo-Yo Intermittent Test app. Both help conduct the 4 Yo-Yo Intermittent tests -- Recovery Level 1, 2 and Endurance Level 1, 2 -- as defined by Jens Bangsbo of Copenhagen University In addition to what the free version has to offer, Pro provides the following: Multiple Users --- Maintain lists of names - save/reload them --- Import names ... locally, iCloud --- Edit, save, reload results --- Graphical analyses -- various - Estimates vo2Max (Recovery Level 1, minimum 1000m) - View progress ... multiple graph options - Training options - skip levels, loop a level - Sort Results. Name, Distance or Date - Export results for spreadsheets Work out, stay fit, rock on! [Reference: Fitness Training in Football, a scientific approach - by Jens Bangsbo (December 1994)]