"Oil Tank Gauge" is an easy to use, free app designed to help crude oil haulers, water haulers, and pumpers who work around tanks in the oilfield and need a way to simplify tank calculations. With this app you will calculate volumes of oil or water in tanks, and legal weight loads with a few swipes of your thumb. Leave your dumb calculator in the glove box and pitch the gravity charts out the window!Features:The Load Calculation screen determines how many barrels of oil you can legally load into your tanker. Just input a weight in pounds (supports 5000-100,000 pounds) into the Available to Load field. Next use the picker wheel to select the oils specific gravity (supports specific gravities of 15-74) into the Gravity of Oil field. "Oil Tank Gauge" then automatically performs all calculations to provide you with the number of Barrels to Load.The Tank Calculation screen determines the total barrels of oil or water in a tank or the total number of barrels removed from a tank. Use the picker wheel to select your tank size in the Tank Size/Calc field. Next use the picker wheel to input the top gauge of your tank into the Top Gauge field and the bottom gauge of your tank into the Bottom Gauge field. "Oil Tank Gauge" then automatically performs all conversions from feet to inches and uses the correct tank strapping calculation to provide you with the number of Total Barrels.The Settings screen is preprogrammed with the most popular tank sizes found in the oilfield (250B, 300B, 400B, 500B, 535B) along with the proper strapping calculation for each tank. You may also edit any of the strapping calculations to your preference and the app will retain this change and implement the change into future calculations. In order to serve various needs, two blank fields have been provided so you can input other tank sizes and strapping calculations.