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
Biking Beacn Pro
Designed for Mountain biking.
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.7
12 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
Make this idea yours
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 included18 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 Biking Beacn 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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Continue in Rork >
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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 social challenges and leaderboards to enhance community engagement.
Assumption to check: Limited social features for sharing rides and achievements.
Validate with people who use this workflow before building.
Hypothesis 2
Add a route planner with customizable paths and elevation metrics.
Assumption to check: Lack of detailed route planning features.
Validate with people who use this workflow before building.
Hypothesis 3
Integrate with HealthKit or Google Fit for comprehensive health tracking.
Assumption to check: No integration with other fitness apps or wearables.
Validate with people who use this workflow before building.
Hypothesis 4
Simplify UI by focusing on essential features and providing a cleaner navigation experience.
Assumption to check: User interface can feel cluttered.
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
Designed for Mountain biking. Beacn tracks your workout progress (time, distance, elevation, speed, calories, cadence and heart rate) with voice cues and special security & privacy features: ** No subscriptions, plans, or accounts required ** ** Private live tracking on a password protected website - Public tracking is optional ** ** Accident detector with automated SMS of your current location ** ** Heart rate limit warning ** ** Heart rate zones ** ** Apple Watch ** ** Workout plans ** ** Pedometer ** ** Music Playlists ** ** Barometer Altimeter ** Challenge your friends on GameCenter or share your sessions on the social networks configured on your iPhone ** No registration required! All data is stored locally and can be transferred by email as GPX files ** Compatible with Bluetooth heart rate monitors Compatible with Cadence Bluetooth sensors Syncs with Health App - Integration by sharing your activity type, energy, start and end dates Syncs with FITBIT® Logs your activities Syncs with UP BY JAWBONE™ Continued use of GPS running in the background can dramatically decrease battery life.
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
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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.
