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.
Decide when and where to surf with Surfline, the most trusted surf forecasting app in the world.
Free · In-app purchases
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.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Surfline: Wave & Surf Reports: map the core Weather workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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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
Assumption to check: Limited camera feeds for certain locations
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Inconsistent update frequency for surf reports
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Navigation can be confusing for new users
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: In-app purchases for premium features may deter users
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Decide when and where to surf with Surfline, the most trusted surf forecasting app in the world. Check live surf cams, expert forecasts, wind, tide, swell data, real-time surf reports and track your sessions at spots around the world. Since 1985, Surfline has helped millions of surfers make better decisions about where and when to surf. Designed by surfers, for surfers, Surfline combines proprietary forecast models, an expert in-house forecast team, and an exclusive global network of advanced live surf cams. Find your next session with everything you need to check the surf - See today’s surf with highlights from 1000+ surf cams around the world - Preview tomorrow’s conditions with footage from similar days - Get the read on today’s conditions from our team of expert forecasters* - See what other forecasts miss with our best-in-class nearshore forecast model - Find your window to surf with hourly ratings, surf height, wind, swell, and tide - Plan your next session or trip with 10-day forecasts, charts, and spot guides - Track your progress and stay motivated with insights and highlights of every session - Get alerted when your preferred conditions line up - Make the forecast your own by customizing your setup Know before you go with Premium: - Watch the surf live with 1000+ ad-free cams around the world - Rewind the cams to review sets, lulls, and conditions over time - See what our forecasters see with incoming swell analysis, days to watch, and region-specific outlooks* - Plan your next session or surf trip with 16-day extended forecasts, charts, and spot guides - Capture your waves with clips of rides and wipeouts from your session - Access exclusive offers and giveaways from brands we use and trust Get everything you need to score with Premium+, powered by the world’s most advanced surf cam network*** - Track every wave with a timeline of wave height and ridden waves - See what’s going unridden with insights on wave distribution and crowds - Track storm and swell patterns with the highest-resolution wave charts available - Find and share your rides by skipping through ridden waves Plus, integrate with partner apps and your wearable devices to unlock deeper insights - Sync with your Apple Watch to log sessions and get clips of your waves sent straight to your phone** - Link Surfline Sessions with partner apps like Strava, Dawn Patrol, and Garmin *Local forecasts are region dependent. **This feature uses HealthKit to monitor and record your calories and heart rate while you surf. Payment for paid Surfline memberships will be charged to your Apple ID Account at confirmation of purchase. All prices exclusive of taxes. Membership plans will automatically renew yearly or monthly, depending on membership plan selection, unless canceled at least 24 hours before the end of the current term. Cancel any time in the App Store; your membership will then cease at the end of the current term. No refund will be issued for the time remaining on your current plan term when you cancel a membership. By using Surfline you certify that you understand and agree to the Surfline Terms of Service (https://www.surfline.com/terms-of-use ) and Privacy Policy (https://www.surfline.com/privacy-policy ). ***Premium+ features are powered by Smart Cams, available regionally in the US, AU and UK
Written user reviews are not shown here. Check current App Store reviews >
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.