App Overview

Masstone icon

Masstone

Chady Kassouf · Graphics & Design

Are you an aspiring artist?

$8.99

PRICE
$8.99
No in-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
1 ratings · Top 5%

Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.

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Build Kit

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A product spec, screen plans, and build steps for your coding agent.

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Combine features and design from your favorite apps.

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What's included16 files

A product spec, phased build plan, differentiation notes, and screen references.

  • START_HERE
  • AGENTS
  • EVIDENCE
  • SPEC
  • BUILD_PLAN
  • DIFFERENTIATION
  • skills/
  • screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.

Feature spec

Goal: Send a clear invoice after finishing a job.

  • Add a client, line items, a due date, and payment instructions.
  • Preview the total before exporting a PDF.
  • Keep an editable draft if export fails.

Screen plan

Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.

States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.

Differentiate and validate

Hypothesis: Contractors need faster repeat invoices more than more templates.

First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.

The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.

Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.

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Quick prompt

> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
Rork plan preview for Masstone: map the core Graphics & Design workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
            

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App evidence

Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.

Screenshots

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App Store description

Are you an aspiring artist? Do you struggle with mixing colors? Masstone turns a color into a paint mixing recipe: which tubes, and how much, from the paints you already own. Give it the color you're after (pick it out of a reference photograph, or just select it from a color picker) and it will give you a recipe you can act on (ex: 2 parts Titanium White, 1 part Ultramarine Blue, 1 part Alizarin Crimson) The hard part was never seeing the color. It's knowing which colors to mix on the palette to get there. REAL COLOR MIXING, NOT RGB AVERAGING Screen color is additive; paint is subtractive. Blend blue and yellow as pixels and you get grey. Masstone never averages RGB. Every mix runs through spectral reflectance curves, so blue and yellow make green, as they do on your palette. BUILT AROUND YOUR PAINT BOX - Set which tubes you own. Recipes are searched only from those. - Star your go-to paints and the search leans toward them. - Set a paint aside to ask "what would this look like without the Cadmium?" WHAT YOU GET FOR EVERY COLOR - The mix, in whole parts you can measure with a knife. - Step-by-step mixing instructions showing the pile's color at each stage. - Alternative recipes. - A warning when a strong tinter is about to run away with the mix. - Pigment sheets: tinting strength, color index, and what to substitute if you don't have it. MORE - Pin colors and compare them side by side. See what they share, where they diverge. - Pick a color without a photo, from a wheel or a hex value. - Acrylic mode shows both the dry color (what has to match) and the wet color (what should be on your palette). - Sample history for the last few picks. IMPORTANT NOTE This is a mixing aid for painters, not a laboratory instrument. Lighting, camera white balance and your own brand of paint all change the outcome. What matters is which pigments to reach for and roughly in what proportion. Made by an oil painter who kept mixing mud.

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Opportunities

AI-GENERATED OPPORTUNITY HYPOTHESES

These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.

Hypothesis 1

Offer advanced color theory tools and more color palettes.

Assumption to check: Limited color options compared to competitors

Validate with people who use this workflow before building.

Hypothesis 2

Enable sharing and collaboration on palettes with friends.

Assumption to check: No user collaboration features

Validate with people who use this workflow before building.

Hypothesis 3

Add an onboarding tutorial to help users understand features.

Assumption to check: No tutorial for new users

Validate with people who use this workflow before building.

Hypothesis 4

Allow users to export palettes in various formats.

Assumption to check: Lack of export options for palettes

Validate with people who use this workflow before building.

Build scope

Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.

Define the first version

Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.

Set boundaries

Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.

Check the hard parts

Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.

SUGGESTED BUILD STACK
React Native
Expo
Zustand
react-navigation
expo-status-bar
expo-color-picker
BUILD KIT DIFFICULTY
Advanced

From the Build Kit assessment.

A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.