The eXact iDip Smart Photometer System is a hand-held, smart photometer system for measuring water quality. Using a patented testing system, it provides two-way wireless connectivity (using Bluetooth SMART) between a handheld photometer and a smartphone or tablet. The multilingual app allows limitless possibilities including lab accuracy, free upgrades, test customization (over 40 available), mobile sharing and data organization. It comes with a 30-day satisfaction guarantee and a two-year warranty. Now available on Apple Watch, too!