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.
Capture and inspect the colors in your photos with Colordrop – a modern and advanced color picker.
$4.99 · 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 Colordrop: Color Picker: map the core Developer Tools 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 selection features
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No option to export colors
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of community sharing
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Inconsistent performance on older devices
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.
Capture and inspect the colors in your photos with Colordrop – a modern and advanced color picker. CAPTURE Capture colors from your photos. - Pick colors from any image or photo. - Open from your Photo Library, Camera, or Files. - Live Capture lets you see the colors around you in real time. - Open images or import colors from Adobe Creative Cloud. - Easily view and pick the most dominant colors in an image. - Select a 'capture radius' to have granular control over the colors you capture. - The Colordrop app extension lets you pick colors without opening the app, for example in the Photos app. - Today View widget shows you your most recent colors. - Manually add a color by hex code or using the built-in color picker. INSPECT The most detailed color analysis tool available on iPhone or iPad. - RGB, CYMK and RYB color overviews. - CIE-LAB, CIE-LCH, HSL, HSV, XYZ color values (and many more). - Complementary and split-complementary colors. - Triadic and tetradic colors. - Tints, shades, tones and monochromatic colors. - Square and analogous colors. - Similar colors for RAL Classic, Web, HKS and many more. - Color blindness simulator and color contrast checker. - Quickly copy or share color codes. - Color descriptions describe the appearance of a color in real terms. - Metadata tells you the source of the color, and when you saved it. EVEN MORE... A powerful tool for developers and creatives alike. - Powerful search feature, including support for Spotlight. - Organize your colors with tags. - Drag and drop colors to other apps, or to save new ones. - Siri Shortcuts for capturing or viewing colors. - Apple Watch app to view all of your saved colors at a glance. - Export colors to Procreate swatch, Adobe color swatch, or to JSON or CSV formats. - Change the default illuminant for accurate color in any environment. - Customize the color data you see. Colordrop is developed by a team of one! Any feedback and suggestions for new features are greatly appreciated. You can get in touch on Twitter (@penguingeorge), or by emailing [email protected].
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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.