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
justPicks
No gambling
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 justPicks: 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
Add social features allowing users to share predictions and results.
Assumption to check: Lack of user engagement features like social sharing.
Validate with people who use this workflow before building.
Hypothesis 2
Expand to include more sports and events.
Assumption to check: Limited sports coverage.
Validate with people who use this workflow before building.
Hypothesis 3
Implement comprehensive analytics for user performance.
Assumption to check: No in-depth analytics or stats tracking.
Validate with people who use this workflow before building.
Hypothesis 4
Create an engaging onboarding process to educate users on app features.
Assumption to check: Poor onboarding experience.
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
No gambling. justPicks lets you make sports picks across NBA, NFL, College Basketball and more — and automatically tracks your wins and losses all season long. Year after year. Think you have an edge? justPicks shows you the truth. Track your real pick record over time and see exactly where you win, where you lose, and whether your instincts are actually as sharp as you think. Most people are surprised to find we'll lose a 50/50 pick more than half the time. For anyone who bets real money on sports, knowing your actual hit rate is the most valuable — and humbling — tool you can have. Compete privately with friends or join an anonymous public group to see how you stack up. Lock in your picks before tipoff, follow your record, and climb the leaderboard. - Spread, moneyline, and over/under picks - Invite friends with a single link — no hassle signup - Track your win rate, streaks, and full pick history - Private groups or anonymous public competition - Leaderboard rankings across your groups - Share your picks to Facebook, X, and WhatsApp One-time $0.99 — no subscriptions, no ads, no in-app purchases. Just you, your friends, and justPicks.
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
React Navigation
React Native Reanimated
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.
