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
Any Counter: Endless Counter
any counter does exactly one thing.
$2.99 · In-app purchases
PRICE
$2.99
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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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included14 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 Any Counter: Endless Counter: map the core Productivity 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
Allow users to personalize counters with more colors, icons, and themes.
Assumption to check: Limited customization options for counters
Validate with people who use this workflow before building.
Hypothesis 2
Implement cloud sync to save counters across devices.
Assumption to check: No cloud sync for data
Validate with people who use this workflow before building.
Hypothesis 3
Add charts or graphs to visualize count changes over time.
Assumption to check: Lack of data visualization for history
Validate with people who use this workflow before building.
Hypothesis 4
Introduce reminders for specific count events or milestones.
Assumption to check: No reminders or notifications for counters
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
any counter does exactly one thing. it counts. not steps. not calories. not habits. anything. count crows on a wire. trees on your street. ants, bees, pages, push ups, days without coffee, dollars saved, postcards sent, or exes you still remember. any counter is a simple, fast, gesture-first counter designed to stay out of your way and let you focus on what you are counting. tap the number or swipe up to increment. swipe down to decrement. swipe left or right to switch between counters. each counter is independent. give it a name. give it a color. keep as many as you want. reorder them. delete them. create new ones when a new counting idea appears. there are no accounts. no sign-ups. no analytics. no ads. your counters live only on your device. any counter is built for moments when you just need to count something without friction, setup, or explanation. count things seriously. count things playfully. count things that matter only to you. if it can be counted, any counter is ready.
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-native-paper
@react-navigation/native
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BUILD KIT DIFFICULTY
Starter
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.
