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
Fantasy Baseball My Playbook
Manage your fantasy baseball lineups and dominate your leagues with My Playbook from FantasyPros.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
5,379 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 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 Fantasy Baseball My Playbook: 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 a more intuitive stats filtering and comparison feature.
Assumption to check: Users report difficulty in navigating the player stats.
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to personalize team names and logos.
Assumption to check: Limited customization options for teams.
Validate with people who use this workflow before building.
Hypothesis 3
Provide clearer descriptions and benefits for each subscription tier.
Assumption to check: In-app purchase options are confusing.
Validate with people who use this workflow before building.
Hypothesis 4
Optimize loading times and performance during high traffic.
Assumption to check: The app can be slow during peak times.
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
Manage your fantasy baseball lineups and dominate your leagues with My Playbook from FantasyPros. My Playbook is a suite of powerful tools to help you make better decisions, manage your baseball lineups, and win your leagues! Created by FantasyPros, the #1 fantasy sports advice and tools provider in the world, this app will let you import your team to get custom fantasy baseball news, rankings, and analysis. Download now for iPhone and iPad for the ultimate edge. --- What do you get with My Playbook? *Custom Advice* Import your team for custom news, rankings, and analysis. *Breaking News and Updates* Stay on top of the latest player news, notes, and updates. *Accurate Player Projections* Access daily, weekly, and season player projections. *Quick Access to Stats & Analysis* Timely research and reports from one convenient spot. More Powerful Tools: *Top Available* Identify the top players to pick up in your league. *Lineup Assistant* See what your optimal lineup is each day/week. *Waiver Assistant* View suggested players to add and drop. *Trade Assistant* Find out if you should accept or reject a trade. *League Analyzer* See how your team stacks up against your league. --- Note: This app supports team imports from the following league hosts: Yahoo!, ESPN, CBS Sports, RT Sports, Fantrax, and NFBC. --- FantasyPros is a leader in fantasy sports and has won several awards at the FSTA (Fantasy Sports Trade Association): - Best Service/Tool - Most Valuable Tool - Most Accurate Projections - Most Innovative Fantasy Product - Best New Fantasy Site --- Upgrade to FantasyPros premium, and unlock powerful draft and in-season features for all sports. If you subscribe via iTunes, payment will be charged to your iTunes Account upon confirmation of purchase. All subscriptions will automatically renew unless unless auto-renew is turned off at least 24-hours before the end of the current period. Your account will be charged for renewal within 24-hours prior to the end of the current period at the rate of your selected plan. You can easily manage or cancel your subscription at any time from your devices App Store Settings. Cancelled subscriptions will continue to have access up until their scheduled renewal date. Privacy Policy: https://www.fantasypros.com/about/privacy/ Terms of Use: https://www.fantasypros.com/about/legal/ --- Got feedback or need help? Visit our help center: https://support.fantasypros.com Follow us for ongoing fantasy updates and hot takes: - Twitter: https://www.twitter.com/fantasypros - Instagram: https://www.instagram.com/fantasypros/ - Facebook: https://www.facebook.com/FantasyPros/ - YouTube: https://www.youtube.com/fantasypros
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
Zustand
axios
react-native-reanimated
expo-router
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.
