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.
Merge pages of choice from one pdf with pages of another PDF files
$3.99 · 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 Joiner & Merger: 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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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 file format support (only PDFs)
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Merging process can be slow
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No option to reorder files after selection
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of clear instructions for new 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.
Merge pages of choice from one pdf with pages of another PDF files. The application offers various cutomizations to merge the PDF files. For example : You could merge page 2 and 4 of a PDF with page number 30 and 32 of another PDF.The resulting PDF will contain 4 combined pages from both PDF files. You could also merge a range of pages of a PDF with other PDF. For example : You could merge from page 5 to 10 of a PDF with page number 30 to 50 or another PDF. Apart from this, the entire PDF could be merged with the other PDF files as well. The application could combine pages of choice from even hundreds of PDF files at once. The application also supports Password protected PDF. This means that once you provide the password, the password protected PDF could be merged easily with other PDF files.The resulting PDF file will not ask for the password. The application also retains all annotations and links in the created PDF files.If you have added annotations and links to a PDF file, these will be retained when the application creates the Merged PDF files. Merging multiple PDF files help to reduce the clutter of PDF files. It also helps to organise the similar topics, novels, pages from books, study topics or the project documentations together. Using the application, you could have your own collection of various categorized PDF. You could combine and keep all of your favourite books, titles, topics or notes together.This will help to find and share these materials easily whenever required.This also simplifies managing PDF files. In order to merge the PDF files, just add them to the application.After you add the PDF files, their merging order could be adjusted using the "Move Up" and "Move Down" buttons. The application comes with its inbuilt PDF previewer.Using this, you could directly preview the PDF files that are added to the application.The previewer also previews the password protected PDF files. The below optional settings could be adjusted for each and every PDF separately as well : a) Password : Provide a password if applicable b) Page Range : Provide a range of pages if required.For example pages from 1 to 10 c) Random Pages : Provide a comma separated values of pages from PDF. For example : You could specify random page numbers like 1,3,5,7,9,42,95 If you want to consider all pages for merging, please check the checkbox named "Merge all pages from this PDF". Once all settings are made, please save these settings.Different settings of page numbers and passwords could be saved for each PDF separately. The application supports batch processing.This means that you could merge even hundreds of PDF files into one PDF.The Merged PDF files could be saved to cloud using the Files application.These could also be shared with other applications.
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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.