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.
Reprints start with one low-resolution image.
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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 PaperDPI - Print Gauge: 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: Users often find measurement apps inaccurate.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited paper sizes to select from.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Poor user onboarding experience.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: In-app purchase complexity.
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.
Reprints start with one low-resolution image. "Will this still look sharp printed at this size?" That hesitation — mid-meeting, or right before you send files off — is exactly what PaperDPI clears up in a few seconds. It's simple. Type in the image's pixel dimensions, pick the paper size you're printing on, and PaperDPI estimates the effective DPI/PPI and tells you, in color, whether the resolution holds up. ■ Your client's images never leave the room PaperDPI doesn't open or upload image files. All it needs is the pixel count, so you can judge a file you've been handed without sending it anywhere. ■ Works with no signal DPI calculation runs offline. In a print shop or a meeting room with no Wi-Fi, it works just the same. ■ The answer is a color, the moment you type Type a number and the background changes. Green, you're good to send. Red, take a second look. No button, no waiting. ■ Catches the weak edge most people miss Orientation sorts itself out. PaperDPI then judges by the weaker of the long and short sides — so a shortfall on one edge won't slip past you just because the other looks fine. Paper sizes: ISO A-series (A0–A6), B-series (B0–B6), business cards, postcards, and L / 2L photo sizes. How to read the result: • Excellent (green) — 300 dpi and up. Commercial print quality. • Good (blue) — 200–299 dpi. Plenty for posters and flyers. • Fair (orange) — 150–199 dpi. Fine for large-format or newsprint; may look soft up close. • Poor (red) — under 150 dpi. Likely to look rough; consider resizing or re-exporting. No ads. One purchase, and the current features are yours. No subscriptions, no extra unlocks. Made for print sales reps, DTP operators, and designers who need to answer "will it print?" on the spot.
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.