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 Fitness Test
Please ensure the volume is turned up and your iPhone is NOT in silent mode when doing a test.
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.0
19 ratings · Below Average
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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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 Beep Fitness Test: 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 diverse test formats and user-defined parameters.
Assumption to check: Limited test types and customization options.
Validate with people who use this workflow before building.
Hypothesis 2
Include social features to compare scores with friends.
Assumption to check: No social sharing features.
Validate with people who use this workflow before building.
Hypothesis 3
Enhance audio playback reliability and quality.
Assumption to check: Inconsistent audio playback quality.
Validate with people who use this workflow before building.
Hypothesis 4
Implement more comprehensive progress analytics and historical data.
Assumption to check: Lack of detailed progress tracking.
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
Please ensure the volume is turned up and your iPhone is NOT in silent mode when doing a test. Need Australian, U.K. or Canadian tests? We've got you covered. Choose from: - Standard (Australia and UK) - Standard 8.5 (Canada) - Birtwell 40 - PACER 15 - PACER 15 UK Police - PACER 20 - YOYO ETL2 - YOYO IETL1 - YOYO IETL2 - YOYO IRTL1 - YOYO IRTL2 *** The best beep test for iPhone *** Beep Fitness Test is the reliable, easy-to-use, and best looking beep test app for iPhone. What is the beep test? The beep test (also known as the bleep test or pacer test) is a multi-stage fitness test used to measure cardiovascular fitness and maximum oxygen uptake (VO2 max). It is commonly used by coaches and trainers to measure athlete fitness, or used as a pre-requisite for police, emergency and military organizations. The standard test has 21 levels, and each level consists of a different number of shuttles. The test is performed by running between two markers placed 20 meters (65.6 feet) apart, at an increasing pace as indicated by the beeps. The test ends when you can no longer keep pace, or level 21 is completed. Detailed information about each test variation can be found in the app's online help.
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
FastAPI
react-navigation
axios
react-native-chart-kit
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.
