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.
Compress PDF and reduce its size by maintaining good quality
$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 Size Compressor: 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 features for advanced users
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: File size limits on free version
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of sharing options
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No preview of compressed quality
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.
Compress PDF and reduce its size by maintaining good quality. For example : If there is a PDF file of size 15 MB, the application could compress it to a size of 5 MB. The application is also very useful for compressing PDF files with scanned pages, graphics and photos. Compressed PDF documents require less disk space for storage and facilitate faster uploads and downloads which saves transmission time, internet data and cost. This application gives you access to many compression options to help you to reduce PDF file size without compromising the document's quality. Key Features: -> Email PDFs easily Compress the PDF file before you email it. In this way, the email will not only be delivered faster but also will be be quicker to open at the receiver's end. The email providers have a file size limit of 20MB, so compressing PDFs will also help to keep the attachment size within limits. -> Download and upload the PDF files easily Compress and use a smaller version of the PDF files with good quality. In this way, the PDF files will load more quickly on your website and it will also download quickly on the visitor's devices. -> Great Quality of PDF Compress your PDF files using multiple compression options to get a combination of prefect quality and file size which is great for uploading files to the web, sharing with the other applications and sending it through email on mobile phones. -> Compress even more by changing the PDF contents to Grayscale : The PDF could also be converted to Grayscale along with the compression. Changing the colour of images and contents of the PDF to grayscale helps in further reducing the file size of the PDF. -> Save disk storage space The compressed PDF files also save storage space on the phone which could help in storing more other files to the device. -> Quick and efficient The application is quick to compress PDF files and produces accurate results. Note : Some PDF documents might not get compressed. This could happen when the PDF is already optimized to maximum extent or there are no compressable items in the PDF file.
Written user reviews are not shown here. Check current App Store reviews >
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.