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.
Send and receive faxes from your iPhone
Free · 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 FaxFlow - Send Fax from iPhone: 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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Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Send and receive faxes from your iPhone. No fax machine, no landline. FaxFlow turns your iPhone or iPad into a fax line: scan a document with your camera, enter the recipient's fax number, and it's delivered — with a confirmation you can keep. What you can do • Send faxes to any fax number in the US, Canada, and worldwide • Get your own US fax number and receive faxes with instant notifications • Scan paper documents with automatic edge detection and cleanup • Attach PDF, JPG, and PNG files from your phone or the Files app • Add a cover page with your name, number, and a short message • Get delivery confirmation for every fax, with a receipt you can share • Failed fax? We retry automatically What people fax with FaxFlow Tax forms to the IRS, applications to government offices, prescriptions and records to doctors' offices, insurance claims, signed contracts, bank documents. If an office still asks for a fax, FaxFlow handles it from your phone in about a minute. Is it secure? Yes. Faxes are encrypted in transit and delivered over dedicated phone lines — often the very reason medical, legal, and government offices still rely on fax. What does it cost? The app is free to download — scanning, cover pages, and fax preparation cost nothing. Sending and receiving require a subscription, because every fax travels over real phone lines we pay to operate. Weekly, monthly, and annual plans are available, and you can cancel anytime. Need just one fax? Take a weekly plan, send it, and cancel — no further charges. Questions? Reach us in the app under Settings → Contact Us, or at www.fax-flow.com. Real humans answer. Privacy Policy: https://fax-flow.com/privacy-policy Terms of Use: https://fax-flow.com/terms-of-use
Written user reviews are not shown here. Check current App Store reviews >
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 document formats supported for upload
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: High subscription costs for casual users
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Slow document processing times
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of user support options
Validate with people who use this workflow before building.
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.