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
Paperly PDF
Paperly PDF lets you convert images to PDF, export PDF pages as images, and merge or split files instantly
Free
PRICE
Free
No in-app purchases
BUSINESS MODEL
Free
No overall Grossing estimate available
RATING
★ 4.2
608 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.
First kit free with a verified email
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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 included
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 Paperly PDF: 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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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
Paperly PDF lets you convert images to PDF, export PDF pages as images, and merge or split files instantly. Fast, simple, and perfect for everyday document tasks. Whether you're a student, professional, or someone who needs a reliable PDF tool on the go, Paperly PDF makes document handling simple, fast, and efficient. Key Features — Image to PDF Convert single or multiple photos into clean, shareable PDF files in seconds. — PDF to Image Export PDF pages as high-quality JPG or PNG images—perfect for sharing or editing. — Merge PDF Files Combine multiple PDFs into one organized document with just a tap. — Split PDF Pages Extract specific pages or separate a long PDF into smaller files. Why Choose Paperly PDF? √ Fast and intuitive – No complicated steps, no learning curve. √ High-quality output – Clear, sharp conversion every time. √ Lightweight and efficient – Get tasks done quickly without heavy tools. Convert, merge, split, and organize PDFs with ease. Paperly PDF is your simple, all-in-one tool for quick document handling on the go.
Written user reviews are not shown here. Check current App Store reviews >
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 more advanced annotation features like shapes and comments.
Assumption to check: Limited annotation tools compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to save PDFs to cloud services like Google Drive or Dropbox.
Assumption to check: No cloud storage integration
Validate with people who use this workflow before building.
Hypothesis 3
Implement advanced search with filters for easier document retrieval.
Assumption to check: Basic search functionality
Validate with people who use this workflow before building.
Hypothesis 4
Optimize app performance to handle larger PDF files without crashing.
Assumption to check: Lack of support for large files
Validate with people who use this workflow before building.
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
Zustand
React Native PDF
Expo File System
React Navigation
BUILD KIT DIFFICULTY
Not assessed in a Build Kit yet.
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.
