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.
App Overview
Fanfold: News as Magazines
Read, don't scroll.
$4.99
PRICE
$4.99
No in-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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.
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A product spec, screen plans, and build steps for your coding agent.
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What's included
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Screen plan
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.
Differentiate and validate
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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
Read, don't scroll. Unfold a story. Fanfold turns your RSS and Atom feeds into printed magazines, in the spirit of a DIY zine. Instead of an endless feed you get issues with a last page: you read a story to the end, long enough to understand it, not just the headline. A double page on the big screen of the iPhone Duo, a single page on any other iPhone. Turning the page curls the paper, sometimes with a misprint. UNFOLD. SIT DOWN. UNDERSTAND. • No endless feed: every issue has a last page. You can finish. • No algorithm: only the sources you chose yourself. • No push notifications: you decide when you read. WHAT'S INSIDE • The wall: all your magazines at a glance, each with its lead story as a pasted-in print. • Real pages: articles set in a calm serif with drop caps and chapter titles, photos as halftone prints or in full colour – your choice. • To the very end: if a feed only gives a teaser, Fanfold fetches the whole article from the page, as long as the page shows it freely. The source is named at the end – tap it to open the original. • Read a source from start to finish: Fanfold keeps every article and prints numbered issues with the next unread ones, oldest first. Nothing gets lost, nothing comes twice. • The cover: folded shut, the iPhone Duo shows the masthead and the lead photo of your newest issue. • Newsstand: 59 hand-picked sources in eight sections – the big Apple blogs, world news, tech, science, culture and design. One tap and it hangs on your wall. • Just type the website: enter a site name or paste any article link – Fanfold finds the feeds by itself. Or share a link from Safari straight to Fanfold. • Easy to move: import your feeds from Feedly, Inoreader or any other reader as an OPML file. • Read aloud: let your iPhone read an article to you, on device. • Offline: Fanfold fetches your magazines in the background and keeps them on your device, so you can read on the train without signal. • Bookmarks and reading position: pick up exactly where you stopped. The screen stays on while you read. PRIVACY No ads, no tracking, no analytics, no account. Nothing leaves your device except the requests to the feeds you read. ONE PRICE, FOR LIFE Pay once, keep it. No subscription – not now, not later. Made in Zurich by HMZ.
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Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
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.
Build scope
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Define the first version
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Set boundaries
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Check the hard parts
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
SUGGESTED BUILD STACK
BUILD KIT DIFFICULTY
Not assessed in a Build Kit yet.
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.
