Halliburton eRedBook® Mobile is a free Android application that provides critical data references for drilling, cementing, and completing oil and gas wells. Derived from the Halliburton Cementing Tables, this app contains volume calculators and data from the American Petroleum Institute (API) for Casing, Tubing, Coil Tubing, and Drill Pipe. With this app, you can instantly access critical pipe dimensions and strengths and look up specifications for frequently used tubular to calculate capacity and annulus volumes with just a few taps. The app provides volume measurements and calculations in Metric or British Imperial units, including custom configurations. It calculates total volumes in various branches, such as barrels, cubic feet, gallons, cubic meters, liters, and more. It also calculates volume per depth in multiple units such as barrels per foot, gallons per foot, liters per meter, and more. In addition, you can copy results with a single click, making it simple to use and indispensable for on-the-go field engineers, business development, and engineering students.