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
Photofile - Web image browser and photo downloader
**Picked as the APP OF THE WEEK in the popular podcast "This Week In Photo."**
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.1
17 ratings · Below Average
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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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included16 files
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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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Photofile - Web image browser and photo downloader: map the core Photo & Video workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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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.
Hypothesis 1
Integrate more image APIs and allow user uploads.
Assumption to check: Limited image sources and quality
Validate with people who use this workflow before building.
Hypothesis 2
Simplify navigation and enhance discoverability of features.
Assumption to check: Confusing navigation structure
Validate with people who use this workflow before building.
Hypothesis 3
Optimize app performance for a wider range of devices.
Assumption to check: Inconsistent performance on older devices
Validate with people who use this workflow before building.
Hypothesis 4
Add advanced options like batch downloads and folder organization.
Assumption to check: Basic download management features
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
**Picked as the APP OF THE WEEK in the popular podcast "This Week In Photo."** Photofile is a high quality, feature rich private browser that downloads full resolution images from thumbnails. Not simply another app that hides your photos behind a password, Photofile contains the magic that allows for bulk downloading a page of thumbnails with a single click! Change the way you browse for pictures forever! With full support to post your images to Tumblr, there's never been a better tool to create a photoblog with. Tag, organize, bulk image download, and keep your photos and browsing secure. ***** "A must have for picture lovers." J. G. C. ***** "Solid app that does what it purports." E. H. ***** "Looking for this type of app for so long. Simply download, store, and organize photos from web pages" J. R. * Photofile features: - Single click download - Track where images came from - Secure password protection - Retina support for higher resolution images - Quicker downloads through gestures * Browser features: - A full featured private browser that's separate from the built-in Safari - Built-in search - Full featured Bookmarks * Photo Features: - Remembers where photos were downloaded from - Dropbox support - Organize through tagging - Automatic grouping by source site - AirPlay support - Slideshow your images * Download Features: - Built-in support for many popular image sites and forums - Single click to download all images on a page - View images while other images are being downloaded * Security Features: - Password protect your data - Erase all your data on too many failed intrusions - Only allows a certain number of wrong guesses per hour to prevent intrusion
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
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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
React Native
Expo
Axios
Zustand
React Navigation
Shadcn/UI
BUILD KIT DIFFICULTY
Advanced
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.
