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.
iAnnotate by Folia is the best way to read, annotate, and share PDFs, Microsoft Office files, images and web pages! Over 1 million people turn to iAnnotate to take notes, sign agreements, highlight documents, insert s...
$9.99 · 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 iAnnotate 4 — PDFs & more: 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: Users report difficulty with syncing documents across devices.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Annotation tools are often seen as limited or clunky.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: App performance can lag with large PDF files.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: In-app purchase process is not clear for users.
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.
iAnnotate by Folia is the best way to read, annotate, and share PDFs, Microsoft Office files, images and web pages! Over 1 million people turn to iAnnotate to take notes, sign agreements, highlight documents, insert stamps and more. New in v4: iPhone support, iPad Pro and multitasking support, automatic Apple Pencil detection, shape annotations, improved web markup, enhanced support for OneDrive (and OneDrive for Business), iCloud Drive, and iCloud backup. iAnnotate’s award-winning interface and customizable set of features make it the go-to app for taking notes on lecture slides, annotating important business documents, revising screenplays, grading papers, and much more. Read on to learn about the great capabilities of iAnnotate: IPHONE: Now you can use iAnnotate on your phone, with all of the great features you’ve come to expect on your iPad. IPAD PRO: iAnnotate works great with the iPad Pro. Automatically annotate when you use the Apple Pencil and easily pan, zoom, scroll with your fingers — no tool switching required. Get more work done with iOS multitasking and smart keyboard shortcuts. ANNOTATE: Choose from the pen, highlighter, typewriter, stamp, straight-line, note, underline, strikeout, photo, voice recording, arrow, rectangle, circle, and date stamp tools. CUSTOMIZE: Drag and drop tools to your custom toolbars. Swipe between toolbars, or open the Toolbox to access all your tools. ACCESS: Connect with Box, Dropbox, Google Drive, OneDrive (including OneDrive for Business) or open PDFs directly from email and other apps. SEARCH: Search documents in your local library and throughout your cloud storage. SHARE: iAnnotate saves your markups directly to the PDF, so they can be viewed and edited in external PDF readers. FLATTEN: Compress your annotations onto the document to prevent modification. This is useful for preserving signatures or for preventing recipients from deleting or changing your annotations. WEB MARKUP: Open a web capture tab and find the site you want to mark up. iAnnotate will convert it to a PDF for annotation. NAVIGATE: Explore your documents by thumbnails, bookmarks, annotations, or search results. UNLIMITED TABS: Open multiple documents in tabs, and easily navigate between them, on both tablet and phone. TWO DOCUMENTS: Work on two documents side-by-side, for even greater productivity. MANAGE: Arrange documents by folders and sort contents by date added, date last opened, or alphabetical order. CREATE: Create brand new PDFs with blank, lined, or graph-paper pages. MODIFY: Add, delete, rotate, and rearrange pages in your documents. SUMMARIZE: Forward a summary of your annotations as an email or a new PDF. SECURE: Full support for the iOS Data Protection and Keychain functions. Interested in using iAnnotate in your business or school? Visit us at www.folia.com to find out about our enterprise options.
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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.