Compare geographic features by selecting them on a map or using the "GO TO" button. Move the selected shape to a new location and fix its position to visualize size and shape differences.
by Ian Clawson★ 4.58 ratingsReference$0.99Data updated 2026-09-06
The app allows users to learn the location and names of China's provinces and their capitals. It includes a learn mode, a location quiz, and a name quiz to aid in geographical education.
Calculate TFA, pressure drop, jet impact velocity, and hydraulic horsepower using nozzle flow area, flow rate, bit size, and mud density. Support ISO and Imperial units. Provide IADC dull grading and fixed cutter bit classification information.