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
Flush Toilet Finder Pro
Flush Toilet Finder Pro is the quickest, simplest way of finding a public bathroom or restroom
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.5
174 ratings · Top 15%
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 included15 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 Flush Toilet Finder Pro: map the core Lifestyle 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 feedback and real-time updates to improve accuracy.
Assumption to check: Limited information about toilet cleanliness and availability.
Validate with people who use this workflow before building.
Hypothesis 2
Enhance search algorithms to include more public facilities.
Assumption to check: Difficulties in locating toilets in rural areas.
Validate with people who use this workflow before building.
Hypothesis 3
Implement offline maps and toilet listings.
Assumption to check: Lack of offline functionality for users in low connectivity areas.
Validate with people who use this workflow before building.
Hypothesis 4
Offer a freemium model with valuable free features to attract users.
Assumption to check: Monetization may deter users from accessing premium 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
Flush Toilet Finder Pro is the quickest, simplest way of finding a public bathroom or restroom. Simply open the app and it will display the nearest toilets to you. It has over 200,000 bathrooms in its database! - Search through 200,000 public loos all around the world! - Find which WC's have disabled access, a fee for usage or require a key! - Get immediate directions on how to locate them! - Add a toilet to increase our list of toilets and improve the app for everyone! - Rate and report a toilet by swiping to the left on a toilet in the list! - Support for the latest iPhone and iPad models. - Pro version is ad-free and includes Apple Watch support! When you're walking around and need the bathroom, don't wait. Install Flush Toilet Finder Pro today and you'll be at a public restroom in minutes. This app is similar to other apps such as SitOrSquat.
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
Zustand
react-navigation
axios
react-native-maps
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.
