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.
PDF Max is a desktop class PDF app for reading, annotating or signing PDF documents on your iPhone/iPad
$4.99 · 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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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 PDF Max Pro: 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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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 annotation tools compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Difficult document organization
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Sync issues with cloud services
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of advanced search features
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.
PDF Max is a desktop class PDF app for reading, annotating or signing PDF documents on your iPhone/iPad. Mark up documents with highlights and handwriting, insert texts and stamps, fill out, sign PDFs and even manipulate PDF pages. With over 3 million downloads across platforms, PDF Max helps hundred thousands of people over the world to go paperless everyday. PDF Max Features: * READING FEATURES - Smooth and responsive even with large PDF documents - Smooth vertical scrolling - allow you to scroll through your entire PDF document smoothly and efficiency. - Open documents in multiple tabs. - Multi-purpose SideBar includes everything you need to skim through your documents like never before: Page Thumbnails, PDF Outlines/Bookmarks, Annotation List & Search Panel. - Smart Zoom: Double-tap on text blocks and PDF Max will zoom the touched text block to fit the screen. Simple & efficient reading. - Friendly & Easy to use User Interface * ANNOTATING FEATURES - Text markup: Highlight, Underline, Strike out & Squiggle - Unlimited threaded comments (notes) attached to any annotation. - Create VOICE ANNOTATIONS: Record and embed voice annotations within the PDF document. - HANDWRITING with Advanced Zoom-In Writing feature - Eraser tools to manipulate your handwriting - Shape tools to draw Line, Arrow, Rectangle & Oval with intelligent snapping - Rich format Freetext tool to type over PDF pages - Stamp tool to insert Predefined, Standard Business Stamps & Custom Stamps - Signature tool to manage and insert your signatures - Undo/Redo function to correct your mistake - Save and organize your favorite tools and access them quickly when needed. - Easy to scroll document while annotating with one finger or stylus pen with optional Horizontal and Vertical ScrollBars - Smart caching mechanism to avoid data loss. * EDITING FEATURES - Manage PDF Pages (Insert, Copy/Cut/Paste, Reorder & Delete PDF Pages) - Manage PDF Outlines (Table of Contents) , PDF Embedded Links * FORM-FILLING FEATURES: - Support Text field, checkboxes, radio buttons, dropdown list, buttons & date-time fields - Support JavaScripted-powered PDF forms - Support AcroForms & Static XFA Forms - Zoom-in writing to fill out scanned/non-interactive PDF forms - Manage your signature plus one-time signature for customer * PDF OUTLINE, PDF LINK & BOOKMARK MANAGEMENT FEATURES - Create and manipulate PDF Outlines - Create and manage PDF Bookmarks - Create and edit PDF Embedded Links * FILE MANAGEMENT FEATURES: - The all-new file manager with Thumbnail View, List View modes. Sort by Name, Modified Date or Size. - Categorize files or folder by Color Tags or Favorites (Starred) - Seamless, desktop-like integration with Dropbox or Google Drive. Work both with or without an Internet connection. - Rename, Copy or Move remote files/folders. - Local Library for organizing files from different sources. - Copy/Move files or folders between online cloud storage services. iCloud Drive support. * OTHER FEATURES - Bookmarks management with ability to export as PDF Outlines - Email or Print PDF in editable or flattened format - PDF documents/forms modified by PDF Max are compatible with Adobe Acrobat standard Let's go paperless! More at https://pdfmax.app PREMIUM SUBSCRIPTION: - Payment will be charged to iTunes Account at confirmation of purchase - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period - Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase - Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. Our privacy policy https://pdfmax.app/privacy Our End-user License Agreement https://pdfmax.app/eula
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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.