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.
Color Calipers is a hands-on color harmony tool for building better palettes from the colors around you.
$2.99 · In-app purchases
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.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Color Calipers: 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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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
Assumption to check: Limited color adjustment features compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No community sharing options for colors
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No integration with design software
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Requires a one-time payment, limiting access
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Color Calipers is a hands-on color harmony tool for building better palettes from the colors around you. Inspired by classic color-wheel methods, Color Calipers lets you explore color relationships visually using live caliper-style controls. Choose a starting context, adjust the color wheel, move the calipers, sample real-world colors, compare harmony options, and create palettes for rooms, clothing, artwork, branding, furniture, flooring, and more. Whether you are choosing an accent wall, coordinating furniture, building an outfit, selecting artwork for a room, or developing a brand palette, Color Calipers helps turn color decisions into a clear visual process. KEY FEATURES Live Color Calipers Move and adjust caliper-style relationships on a color wheel and watch your palette update instantly. Color Harmony Tools Explore common harmony structures including split complementary, complementary, analogous, triadic, monochromatic, tetradic/rectangle, and square relationships. Photo and Camera Sampling Use a photo or your camera to sample colors from walls, furniture, flooring, clothing, artwork, or materials. Tap multiple points to create an averaged baseline color. Context-Aware Palette Building Start with the design situation that matters to you: • Wall paint • Furniture • Clothing • Carpet or flooring • Artwork • Branding • Other color projects Style Era Mode for Clothing Explore historically inspired clothing palettes by decade, movement, and interpretation. Choose eras and substyles such as Hollywood glamour, post-punk, new wave, goth, rockabilly revival, heavy metal, preppy, hip-hop/streetwear, and more. Paint Store Color Cards Create paint reference cards from selected palette colors. View HEX, RGB, HSL, CIELAB, estimated LRV, and closest paint matches from the local paint database. Saved Palettes Save palettes for later, reload previous work, compare options, and continue refining your color direction. Print and Share Export, print, or share paint-card references for discussion, planning, or collaboration. BUILT FOR REAL DESIGN DECISIONS Color Calipers is not just a color picker. It is a visual decision tool. The app helps you see how one color relates to another, how a palette changes as the calipers move, and how a sampled real-world color can become the starting point for a stronger palette. Use it for: • Interior color planning • Accent walls and trim coordination • Furniture and room palettes • Clothing and outfit color combinations • Artwork and frame coordination • Branding and communication palettes • Paint color exploration • Creative color studies IMPORTANT NOTE Paint matches and digital color previews are approximate. Color appearance can vary by display, lighting, sheen, paint base, material, and surface. Always verify final paint choices with a physical manufacturer chip or paint store sample. Color Calipers does not generate paint-store mixing formulas or tint percentages. Paint stores create formulas using their own brand, base paint, tint system, and colorant machines.
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Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.