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.
GridPainter is the premium application to use compose your next masterpiece
$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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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 Grid Painter: map the core Photo & Video 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 options for painting
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No cloud backup for artwork
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: User interface can be confusing for new users
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of sharing options to social media
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.
GridPainter is the premium application to use compose your next masterpiece. It lets you quickly and easily place a grid onto an image for the purpose of using the grid technique of drawing and painting, the same method even Leonardo da Vinci used in his work. With the portability of our devices and access to thousands of images at our fingertips, more artists than ever are using them as a reference for drawings. With GridPainter, the process of drawing accurately from your device is easier than ever. Simply select the photo you wish from your photo library or using the "Open In" functionality in Messages or email, and the app will scale your image and place the "fourths" style grid over the top. From the toolbar on top you will find easy to use controls. -Select a standard canvas or customize your canvas size. -Customize your grid pattern from several different styles. -Crop We have also integrated some basic functions from our sister application NotanIzer so now you can -Look at you image in color, gray scale, Notan, 3 Level, 4 level, or Levels Everything is saved and you can work with your image in the app, or using the share menu, print, email, or export it to your photo library. To create a drawing from the photo, simply draw a grid of the same proportions on your drawing material as your selected final project size and grid size. From there you can easily transfer the image by drawing whats in each square, letting the grid take care of the proper scaling and framing within your picture. Great for when you need to draw a large drawing from a small reference photo, or for drawing complicated imagery. Features: -Select an image from your camera roll , import, or take a photo directly from the app -Choose final image size -Place a grid over the image using different grid types -Change the grid size -Change the grid color for best visibility over the image -Select any canvas size or automatically choose the aspect ratio or use the Golden Ratio -Scale and move your image to fit exactly where you want -Save the project for later revisions -Print or share your project with others
Written user reviews are not shown here. Check current App Store reviews >
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.