eCalculator has seven modules. Five calculators; a Numeric Calculator, a Time Calculator, a Loan Calculator, which will also build an editable amortization table, an Interval Calculator for calculating time or date intervals, and a Converter for changing units of measure into different unit of measure. Two modules are Calendar, and World Timer, which is a world clock, a stopwatch, and a timer combined. The last two modules are Notes and eClipboard which are common to all e7.pan files.
The basic numeric calculator is what gets the most use. It is duplicatable, allowing you to make calculations and view data comparisons between windows easily. It has an editable text formula, allowing you to change a formula after you enter it. This uncommon feature allows you to enter and edit calculations quickly and easily, just like typing data into the cell of a spreadsheet. The result display updates automatically as you type. The contents of the text editor and the total displayed are always the current calculation. It is much better working environment than most calculators. You can add text to the formulas, and save the entire equation to Notes. It automatically displays the result. It is great because it automatically stores both the result and the formula of previous equations.