Never run out of oxygen!This app allows, knowing the capacity and the pressure of a cylinder of oxygen for medical use, to know how much remaining time remains to the patient, depending on the extent that seglie to administer.To speed up the calculation operations, 5 types of cylinders are already pre-loaded:* Maxi: 10 liters.* Large: 7 liters.* Average: 5 liters.* Small: 2 liters.* Torpedo: 0.5 liters.