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
Chronogolf by Lightspeed
Chronogolf helps you play more golf by providing the easiest way to book your next round at your favorite golf clubs.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
29,964 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 included17 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 Chronogolf by Lightspeed: map the core Sports 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
Focus on expanding course database and partnerships.
Assumption to check: Limited course selection compared to competitors.
Validate with people who use this workflow before building.
Hypothesis 2
Implement responsive design principles.
Assumption to check: Inconsistent user experience across different devices.
Validate with people who use this workflow before building.
Hypothesis 3
Improve backend reliability and load handling.
Assumption to check: Occasional booking errors during peak times.
Validate with people who use this workflow before building.
Hypothesis 4
Add social features like friend invites and leaderboards.
Assumption to check: Lack of social features for sharing experiences.
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
Chronogolf helps you play more golf by providing the easiest way to book your next round at your favorite golf clubs. BOOK TEE-TIMES Explore clubs nearby or around the world and enjoy a simple booking process on your mobile device. BENEFIT FROM EXCLUSIVE OFFERS Be on the lookout for discounted tee-times provided by participating golf clubs. ACCESS TO MEMBER TEE-SHEET Choose your golf partners thanks to a new visualization of the tee-times where the number of places available, the names of the players and their handicap are visible! (Requires a membership to participating club) CLAIM YOUR PREPAID PACKAGES Use your prepaid rounds of golf or carts simply and directly in the booking process. You can also keep an eye on the remaining usage! INVITE YOUR GUESTS Notify your guest or fellow members of your booking by inviting them in your booking. They will be aware of any events related to your reservation. Find us also on your club's website or on our marketplace at https://www.chonogolf.com Discover us on Facebook: https://facebook.com/chronogolf Discover us on Twitter: https://twitter.com/chronogolf Discover us on Instagram: https://instagram.com/chronogolf
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
Supabase
Zustand
React Navigation
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.
