RPaintLite is fully functional with a limited number of Paint Lines ("ideal paint" and the airbrush paint "Ferrario Acrylic Pen Colors" are available).
Please note that RPaintLite includes 8 paint bases of each Paint Line. These bases are Black, White and 3 or 6 colored ones, according to your Palette selection. These bases are fixed, and all color recipes use these and only these. Therefore, once you've selected your real Paint Line (Ferrario Acrylic Pen Colors in this free version), you can purchase the 8 bases and use them for all your paintings. The 6 colored bases of each Paint Line were optimized to cover the widest possible OPAQUE color space offering you as many as possible mixable colors. These tools use measurements of real paint spectra, so big part of the RGB/P3 space can be mixed, but not all RGB/P3 colors. This is not a limitation of the app, just physics. There are also many colors which can be mixed, even if they don't belong to the RGB/P3 color space (you can find these by manually varying the paint base amounts on the "mixing" page and reading the Lab values).
RPaintLite can be used on iPhone or iPad with iOS 9.0 or later. Even an old iPhone 4S or mini iPad can find a second life and become a Real Paint Mixing Device!
Painters can select colors from an image and have the corresponding paint mixing recipe computed. This is very useful to art students, to painters with color vision difficulties or to those working in the painting conservation and restoration fields. Paint and money waste can be greatly reduced!
Color Coordinates can be converted from one space into another: sRGB, Display P3, CMYK, HSL, HSV/B, Lab, Lch-ab, Luv, Lch-uv, XYZ, xyY are available. The Munsell space is not available in this free RPaintLite app.
Digital images usually don't fit into the color gamut of real paint lines. RPaintLite can find an approximated (de)saturation value of an image to fit it into the selected Paint Set color gamut with the current mixing parameters. The value is approximated, because it is based on heuristics, but it is usually a very good approximation.
Please note that color of paint coming from different batches of the manufacturer can vary, so mix small amounts first to be sure that computed recipes meet your needs!!
Please check the video tutorials on youtube by searching for "Real Paint mixing tools" to see how to use these apps in your paintings.
bug fixes and performance improvements
With Family Sharing set up, up to six family members can use this app.