Color Scheme Designer vs Plus42

In the color scheme designer application, you can change the color of the 16 panels and create a color scheme. The RGB values can be adjusted within the range of 0 to 255 respectively. The panel displays the R / G / B value of the current color of the panel and the HTML color code expressed in hexadecimal notation. The operation procedure is as follows. [Step 1] Tap and select the panel whose color you want to change. You can tap more than one panel and change the color at the same time. [Step 2] Move the sliders R, G, B at the bottom of the screen left and right to change the color. [Step 3] If you want to change the RGB value in finely, tap the buttons "+1", "+ 10", "-1", "- 10" next to the slider. [Step 4] When you finish changing colors, tap the panel again to deselect it. [Step 5] If the RGB value displayed on the panel is unnecessary, please turn off "RGB value switch" on the left. Then the display of RGB values disappears. If you want to check again, it will be displayed if you turn on the switch. [Step 6] If you want to return all changes to the initial state, tap the "ALL Reset" button on the right. It returns to the state at the time of application start.

Plus42 is an advanced scientific programmable calculator, based on Free42. Free42, in turn, is a complete re-implementation of the HP-42S scientific programmable RPN calculator, which was made from 1988 until 1995 by Hewlett-Packard. Free42 is a complete rewrite and contains no HP code whatsoever. Plus42 builds on Free42 and adds: Algebraic expressions modeled after those used on the HP-27S and HP-17B/19B; attached units and unit conversions modeled after those used on the HP-48/49/50 series; directories for more organized storage of programs and variables; a larger display, with 8 rows and 22 columns (131x64 pixels) by default, which the user may resize at will; time value of money and amortization schedules; and two-dimensional plotting of functions, with ability to zoom and pan, and find integrals and roots from points in the plot.