e-calcFree 1.23

This calculator offers versatility in representing numerical values, supporting both scientific notation (e.g., 1E-6) and engineering prefixes (e.g., p, n, u, m, k, M). By pressing the [ENG] button, users can switch the display of calculation results to engineering notation (e.g., 1n for 1E-9), facilitating easier interpretation of values in engineering contexts.

The application maintains a history of previous calculations, which are accessible in the designated history area. Tapping the formula section allows for editing and recalculating expressions without limitations.

Unit inputs are supported via dedicated buttons, corresponding to the following prefixes: p = 1E-12, n = 1E-9, u = 1E-6, m = 1E-3, k = 1E3, M = 1E6. The prefixes f (femto) and G (giga) are used solely for display purposes only, with f = 1E-15 and G = 1E9.

On an iPhone 4, the history area displays up to four lines; on an iPhone 5, up to nine lines are visible.

The free version of this calculator has certain limitations. Users cannot scroll through the history area, and previously stored calculations are not retained upon exiting the application.