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
PDFMaker : Scanner Converter
PDFMaker - a free and all-around PDF conversion tool that can handle all document needs in one click!
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.0
1,356 ratings · Top 30%
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.
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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included18 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 PDFMaker : Scanner Converter: map the core Business 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
Implement advanced image processing algorithms for better quality.
Assumption to check: Scanned documents may lose quality and detail.
Validate with people who use this workflow before building.
Hypothesis 2
Add support for multiple formats (e.g., JPG, DOCX) and cloud integration.
Assumption to check: Limited export options for scanned documents.
Validate with people who use this workflow before building.
Hypothesis 3
Ensure app responsiveness and test across a variety of devices.
Assumption to check: Inconsistent user experience across devices.
Validate with people who use this workflow before building.
Hypothesis 4
Simplify the subscription process and provide clear options for users.
Assumption to check: Complicated subscription management.
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
PDFMaker - a free and all-around PDF conversion tool that can handle all document needs in one click! Easily create, convert, and merge PDFs, a must-have for efficient office and study! Whether you are a student, office worker, or freelancer, PDF Maker can be your right-hand man! No complicated operations are required, and your mobile phone can quickly complete various PDF processing, completely free! Core function highlights: Photo to PDF: Take pictures of class notes, contracts, and books, intelligently optimize the image quality, generate high-definition PDFs with one click, support automatic cropping, and enhance text clarity! Image to PDF: Supports merging multiple photos into PDF, freely adjusting the order and direction, and convenient for storage and sharing! Text to PDF: Directly enter text content to generate professional PDF documents, suitable for resumes, reports and other scenarios! Merge multiple files: Merge multiple files into one PDF to organize materials more efficiently! Why choose PDFMaker? Completely free - no subscription, no in-app purchase, all functions are free! Easy operation - complete the conversion in three steps, even novices can easily get started! Have problems? Contact us: [email protected] Privacy and security commitment: All file processing is completed locally, not uploaded to the server, to protect your data security! Download PDFMaker now to make document processing simpler and more efficient!
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.
SUGGESTED BUILD STACK
React Native
Expo
Supabase
@react-navigation/native
@react-native-paper
expo-camera
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.
