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
90+
Welcome to 90Plus - The ultimate destination for all football fans!
Free
PRICE
Free
No in-app purchases
BUSINESS MODEL
Free
No overall Grossing estimate available
RATING
★ 5.0
3 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 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 90+: 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
Include a wider range of workout types and custom logging options.
Assumption to check: Limited exercise variety and logging options
Validate with people who use this workflow before building.
Hypothesis 2
Add social sharing capabilities to allow users to share workouts with friends.
Assumption to check: Lack of social sharing features
Validate with people who use this workflow before building.
Hypothesis 3
Integrate with fitness trackers and smartwatches for automatic logging.
Assumption to check: No integration with wearable devices
Validate with people who use this workflow before building.
Hypothesis 4
Implement more detailed analytics and progress tracking features.
Assumption to check: Minimal progress tracking options
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
Welcome to 90Plus - The ultimate destination for all football fans! The 90Plus app puts the world of football right at your fingertips. Whether you want to follow your favorite team, get live match scores, or catch up on the latest sports news, 90Plus is your perfect companion to live the passion of the beautiful game. Key Features: • Live Coverage: Follow match scores moment by moment with fast and accurate updates. • Tournaments & Leagues: Stay updated with the standings of major leagues (such as the Premier League, La Liga, Serie A, SPL, UEFA Champions League, and more). • Football News: Comprehensive coverage of the latest transfers, team news, and statements from players and managers. • Fixtures & Schedules: A complete and clear match schedule to track the timings of all upcoming clashes with ease. • Personalized Experience: Choose your favorite teams and leagues to receive all their latest updates via custom push notifications. Ensure you never miss a highlight. • Modern & Fast Design: An innovative Dark Mode user interface that is easy on the eyes and extremely simple to navigate. Don't miss any crucial moment after the 90th minute! Download the 90Plus app now and stay at the heart of the action.
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
victory-native
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.
