Undertint: Mix Watercolour
iOS app by Justin Stach. Graphics & Design · Justin Stach
- Store rating
- 0 / 5
- Store rating count
- 0
- Download price
- Free to download
- In-app purchases
- Unknown
- Version
- 1.3
- Listing last refreshed
- 2026-09-12
View the original store listing
Store description excerpt
Undertint helps watercolor painters answer one question: how do I mix that color, with the paints I already have? Point Undertint at a photo. The app simplifies the image into the colors you would actually need to paint, then gives you a mixing recipe for each one, drawn from your own palette. Recipes use Kubelka-Munk pigment mixing, the same math color scientists use to model how watercolor pigments combine on paper. The output is a recipe you can mix at the page, not a color you can only see on a screen. Everything happens on your device. Photos never leave your phone. Free to try. Pro unlocks multi-paint mixing recipes and bookmarking as a one-off purchase or a monthly subscription. Features • Photo simplification with adjustable detail. Pull the slider down for big color shapes, up for finer control. • Tap any region to see the color identified in painterly terms and a Munsell reading. • Mixing recipes from your own paints from a catalog of over 200 paints and growing. • Dilution gradients show how a color shifts as you add water, so you can match the value as well as the hue. • Save value studies to your photo library to use as on-easel references. • Bookmark the recipe you'll mix for each color, and Undertint will use it to prioritize coherent recipes. Who Undertint is for Watercolorists who want to spend less time second-guessing color mixes and more time painting. Beginners learning what their paints can do, and experienced painters who want a quick second opinion when matching a tricky reference color. What Undertint isn't Undertint isn't a digital painting app. It doesn't replace mixing on your palette. It helps you decide and learn how to mix. About brand names Brand and product names referenced are trademarks of their respective owners, used only so you can identify your own paints. Undertint is independent of and not affiliated with any of them. Privacy Undertint does not collect, transmit, or sell your data. No analytics, no advertising, no third-party SDKs, and no network requests except to Apple's App Store for purchases. Photos you import are processed on-device and never leave your phone. Terms of use (EULA) See: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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