Calculate tips by entering a bill amount and selecting a tip percentage. Display total and per-person costs. Split bills among multiple people. Works on iPhone and iPad with a clean interface. Includes a small ad banner. Free to use.
Calculate trigonometric values for the by inputting radians or angles. Display step-by-step solutions and support negative numbers, decimals, and fractions. Save calculations in history and share results.
Measure sound levels with a precision noise meter, including OSHA/NIOSH compliant dosimetry and impulsive noise detection. Display live spectrum and capture measurement snapshots. Email results and access hearing protection guidance.
