Calculatrice + Historique vs Smart Adding Machine

Calculator brings five focused calculators into one clean, fast app. Switch between standard, scientific, fraction, percentage and unit conversion tools from the top menu. Standard calculator: large-number arithmetic, saved history and quick correction. Scientific calculator: expressions, trigonometry, logarithms, powers, roots, constants and DEG/RAD modes. Fraction calculator: add, subtract, multiply and divide fractions with simplified and decimal results. Percentage calculator: percentage of a value, proportions, percentage change and discounts. Unit converter: length, mass, temperature, area, volume, speed and time. The app works offline, keeps a clear history for everyday calculations, and supports English, Simplified Chinese, Traditional Chinese, Korean, Japanese, French, German and Spanish. Remove ads anytime with a one-time in-app purchase.

This app has a numeric keyboard. It may not always be visible. If it is not visible, pressing the input button that has the text 'Insert an Amount or ...', will cause one to appear. If you want to hide it, select the button on the left titled 'Hide KB'. The Adding Machine contains a visual tape with two columns of numbers. The left is the amount you keyed. The right column has in a '1' which is the count. The system puts in a '1' for you. As you add items, the tape grows. The last item is always followed by an empty item colored red. This color red is important because it indicates where your next entry will be placed!!! After entering a number, press the 'Save' button. If this is your first entry, two items will appear on the tape. The first one will contain the number you keyed. The second will be red with the amount showing: 0.00 and a count showing 1. This pattern will continue as you add items On the left side of the screen are 11 buttons in a column. The first six are for moving the red color - but not its contents. This allows for the correction of errors. The first two are: first - go to tape start & second to tape end (red item). The second two go up one item and down one item on the tape. The last of the group switch between amount & count - usually used to change the count from 1. There a 4 named buttons the effect the tape: Clear, Insert (an empty row where the red is, Delete(the row that a red item) and Hide KB. The keyboard has no minus sign. There is a slider button that can be used to cause an number to be negative. It is red for emphasis At least 50 items can be entered. The tape can be scrolled by using your finger to see the entire tape. At the very top of the screen is a 'Help' chevron that switches to a page of help text.