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.
App Overview
Paper: Sketch, Draw & Create
over 30 million people set their ideas free with paper®, the award-winning immersive sketching app.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.6
70,025 ratings · Top 15%
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.
Build your own version
Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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Add to a Remix
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.
What's included17 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
Preview a sample Build Kit No email needed
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
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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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Paper: Sketch, Draw & Create: map the core Productivity workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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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
Provide a wider range of brushes and textures.
Assumption to check: Limited brush options compared to desktop software
Validate with people who use this workflow before building.
Hypothesis 2
Implement a more intuitive undo/redo experience.
Assumption to check: Difficulties with undo/redo functionality
Validate with people who use this workflow before building.
Hypothesis 3
Add better organization features like folders or tags.
Assumption to check: Gallery can become cluttered with too many artworks
Validate with people who use this workflow before building.
Hypothesis 4
Make prompts more subtle and less frequent.
Assumption to check: In-app purchase prompts can be intrusive
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
over 30 million people set their ideas free with paper®, the award-winning immersive sketching app. sketch with confidence paper’s perfectly-tuned tools make it easy to sketch, collage, paint, draw—wherever your thoughts take you. wave goodbye to distracting menus and let natural gestures guide you, keeping you in your creative flow. get creative (without the mess) add multiple photos to a single page and cut, stick, move, and fix without the fuss of complex layers. from mood boards to storyboards, pull in inspiration from anywhere and get your ideas moving. your ideas, your way wherever and however you get your ideas, it’s never been easier to put them on paper. organize pages into beautiful journals and sync them across your devices, ready to pick up where you left off. create like a pro take creativity to the next level and subscribe to paper pro for more tools, features, and journals. subscription is optional and you can cancel anytime. to upgrade, simply visit the paper pro section in your settings menu. * payment will be charged to your itunes account once you confirm the purchase. * your subscription will automatically renew at the end of your subscription period. to opt out, you must turn off auto-renew at least 24 hours before the end of the current period. * manage changes to your subscription in the itunes account settings. * any unused portion of a free trial will be forfeited when you purchase a paper pro subscription. love paper? leave us a review! thanks to your comments, reviews, and tweets we can continue to evolve paper with you in mind. questions? shoot us an email at [email protected]. terms of service: https://paper.bywetransfer.com/terms privacy policy: https://paper.bywetransfer.com/privacy patents: https://paper.bywetransfer.com/legal/patents
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
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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.
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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.
