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
Tap Tool Pro
Simple but amazingly useful!
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.3
29 ratings · Top 30%
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 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 Tap Tool Pro: map the core Utilities 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
Add more tools and features like customizable toolsets.
Assumption to check: Limited functionality compared to full-featured utility apps
Validate with people who use this workflow before building.
Hypothesis 2
Implement a favorites section for easy access.
Assumption to check: No favorites or quick access to commonly used tools
Validate with people who use this workflow before building.
Hypothesis 3
Ensure regular updates and user feedback incorporation.
Assumption to check: Inconsistent updates and support
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
Simple but amazingly useful! The Tap Tool does all of the hard work while you tap on the screen of your iOS device. Who is it for? As a health measure, you can use Tap Tool to quickly measure your heart rate or breathing rate. Learning to play a new tune? Ask Tap Tool to tell you the beats per minute of a favourite music track. In a survey you could use Tap Tool to count things/people/events/cars without using a pen or needing to look away. At school, university or in the lab, use Tap Tool to time a swinging pendulum or oscillating spring in a science experiment or ANY periodic event. Simply tap out a heart/pulse rate or tap in time to music or tap as a pendulum swings past and Tap Tool will calculate the following for you automagically... 1) Total number of taps 2) Elapsed time (how long you have been tapping for) 3) Average rate of tapping (the calculated average number of taps per minute) 4) Average time period between each tap on the screen. Download the app, interact with its simple interface and see what YOU can tap to... If there's anything you'd like added to the app, contact us via our website. We hope you enjoy using Tap Tool, and please let us know of the most bizarre thing you have used it for.
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
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Zustand
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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.
