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
Gluten Free Philly
**Top 5 paid Food & Drink iPhone app in its debut week**
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.8
9 ratings · Top 50%
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.
Build your own version
Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included17 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
Preview a sample Build Kit No email needed
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 Gluten Free Philly: map the core Food & Drink 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
Incorporate user-generated content to expand the database.
Assumption to check: Limited gluten-free options in specific areas
Validate with people who use this workflow before building.
Hypothesis 2
Implement advanced filtering and sorting options.
Assumption to check: Poor search functionality
Validate with people who use this workflow before building.
Hypothesis 3
Introduce user feedback and reporting features for updates.
Assumption to check: Infrequent updates to restaurant information
Validate with people who use this workflow before building.
Hypothesis 4
Add a social feature for users to share experiences and tips.
Assumption to check: Lack of community engagement
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
**Top 5 paid Food & Drink iPhone app in its debut week** The best of the award-winning Gluten Free Philly blog is now in the palm of your hand. Find more than 1,600 curated gluten-free-friendly restaurant, bakery, market and attractions listings covering southeastern Pennsylvania, southern New Jersey and all of Delaware, with new listings frequently added. Search by name, location or cuisine, view gluten-free-friendly menus and options, get directions, and call listed businesses from your phone. Features include: * More than 1,600 (and counting) curated restaurant, bakery, market, caterer and attractions listings, including more than two dozen all-gluten-free businesses, in the greater Philadelphia area * Listings include establishments in Berks, Bucks, Chester, Delaware, Lehigh, Montgomery, Northampton and Philadelphia counties in Pennsylvania; Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester, Hunterdon (Lambertville), Mercer, Ocean (Long Beach Island) and Salem counties in New Jersey; New Castle, Kent and Sussex counties in Delaware * Searchable listings by name, city, ZIP Code or cuisine * Find 100-percent gluten-free restaurants and bakeries in the region * Find businesses nearest your current location in the greater Philadelphia area using the Near Me feature * Save your favorites for ready reference * One-click access to business websites, gluten-free-friendly menus and options and Gluten Free Philly reviews (where available) * View listings and restaurant menus not available anywhere else * Get directions for businesses and call directly from your phone * Make restaurant reservations through OpenTable and other services * Read the latest Gluten Free Philly blog posts and local events calendar * Suggest new businesses via email
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
Supabase
Axios
@react-navigation/native
BUILD KIT DIFFICULTY
Intermediate
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.
