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
NHL
The Rush to the Playoffs is on and only one team will lift the Stanley Cup
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
134,707 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
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A product spec, screen plans, and build steps for your coding agent.
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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/
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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 NHL: 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
Implement customizable push notifications based on user preferences.
Assumption to check: Inconsistent notifications for live game updates
Validate with people who use this workflow before building.
Hypothesis 2
Add advanced filtering and sorting features for articles.
Assumption to check: Limited filtering options for news articles
Validate with people who use this workflow before building.
Hypothesis 3
Create a more intuitive navigation structure for easier access to team/player stats.
Assumption to check: Difficulty in navigating between teams and players
Validate with people who use this workflow before building.
Hypothesis 4
Integrate social sharing options for news articles and game highlights.
Assumption to check: Lack of social sharing features
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
The Rush to the Playoffs is on and only one team will lift the Stanley Cup. The NHL App is your home for the Stanley Cup Playoffs, featuring: – Stats, reimagined. We’ve got League and Playoff Leaders, and a whole lot more. Explore more EDGE Advanced Stats, Data Visualizations and new ways of looking at the game. – A refreshed design updates & optimizes Gamecenter for iOS 26. – Live Activities. Choose one game, or opt in for any (or all!) teams so you can set it and forget it. – How to Watch: With more ways than ever to watch a game we've got you covered – all the info to know where to stream, tune in or follow along. Experience all the NHL App has to offer just the way you like it: breaking news notifications, up-to-the-minute scores and live Gamecenter, new EDGE stats, Game Stories & video highlights, your favorite team’s icon plus Goal Horn game alerts & much more. By downloading and using the NHL® app, you acknowledge and agree that (i) you have read, understood and agreed to be bound by the NHL.com Terms of Service (https://www.nhl.com/info/terms-of-service) and (ii) the information you provide will be handled in accordance with the NHL.com Privacy Policy (https://www.nhl.com/info/privacy-policy). Features and content within the NHL® app are subject to change. NHL, the NHL Shield and the word mark and image of the Stanley Cup are registered trademarks of the National Hockey League. NHL and NHL team marks are the property of the NHL and its teams. © NHL 2026. All Rights Reserved.
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
Axios
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.
