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
Beep Test Pro
Advanced testing for a group or yourself
$7.99 · In-app purchases
PRICE
$7.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
1 ratings · Top 5%
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/
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 Beep Test Pro: map the core Health & Fitness 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 test variations and user-defined workouts.
Assumption to check: Limited workout variety and customization options
Validate with people who use this workflow before building.
Hypothesis 2
Incorporate social sharing and challenges.
Assumption to check: No social features for sharing achievements
Validate with people who use this workflow before building.
Hypothesis 3
Introduce gamification elements and progress tracking.
Assumption to check: Lack of motivation features
Validate with people who use this workflow before building.
Hypothesis 4
Integrate with HealthKit and Google Fit for enhanced user data.
Assumption to check: No integration with health tracking platforms
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
Advanced testing for a group or yourself. Record, evaluate, improve! A sophisticated app for testing groups and for advanced individual testing. Provides both the original Luc Leger's protocol (1984) as well as the most popular "at-least-60-seconds" alternative. An enhanced version of the free basic Beep Test Leger app. In addition to all that Beep Test Leger has to offer, Beep Test Pro provides the following: Multiple Users --- Maintain lists of names - save/reload them --- Edit, delete, save, reload results --- Graphical analyses -- various --- Import names... sdCard, Cloud - Enhanced Voice Cues - Training options -- skip levels, loop a level - Sort Results. By Name, VO2Max or Date - View progress ... graphically; group options - Export Results... locally or iCloud - Super-accurate timings - Option to run first level at 8 kph - Option to run 15 meter lap (default 20) Work out, stay fit, enjoy life more!
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
@react-navigation/native
react-native-paper
expo-av
axios
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.
