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
Backyard Baseball '97
Rediscover the joy of the original Backyard Baseball 1997! Build your roster from the iconic cast of 30 characters stacked with charming personalities and witty banter, and get the edge on the competition with power-u...
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.0
1,551 ratings · Top 30%
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.
Build your own version
Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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Combine features and design from your favorite apps.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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/
Preview a sample Build Kit No email needed
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 Backyard Baseball '97: map the core Games 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
Allow deeper customization of player attributes and appearances.
Assumption to check: Limited player customization options
Validate with people who use this workflow before building.
Hypothesis 2
Introduce more varied game modes and challenges.
Assumption to check: Repetitive gameplay
Validate with people who use this workflow before building.
Hypothesis 3
Implement adjustable AI difficulty levels based on player skill.
Assumption to check: Inconsistent AI difficulty
Validate with people who use this workflow before building.
Hypothesis 4
Add online multiplayer features for competitive play.
Assumption to check: Limited multiplayer 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
Rediscover the joy of the original Backyard Baseball 1997! Build your roster from the iconic cast of 30 characters stacked with charming personalities and witty banter, and get the edge on the competition with power-ups, fireball pitches, super strength, and Pablo Sanchez! Play pick-up games, practice batting, and compete in single games or a whole season with simple, intuitive controls that anyone can master! Game Modes: Random Pick-up: A quick way to jump right in! The computer chooses a random team for you and itself, and the game starts immediately. Single Game: You take turns with the computer to choose players from a random pool of characters. Season: You create a team and manage it through a 14 game series. The opposing teams are computer generated. At the end of the season the best two teams advance to the BBL playoffs (best of 3). The winner advances to the championship series which consists of the Super Entire Nation Tournament (best of 3) and then the Ultra Grand Championship of the Universe Series (best of 5)! Batting Practice: Choose a batter and face Mr. Clanky for some batting practice. This is where you’ll learn just when to click to make your chosen batter hit that ball! T-ball - Select T-ball mode for more accessible game play. Simply click to hit, run, and field! BACKYARD BASEBALL RULES The rules for Backyard Baseball are a hybrid of Pro and Little League rules: No leading off No Injuries Bunting is allowed Tagging up is allowed Stealing is allowed At our core, we are fans first–not just of video games but of the Backyard Sports franchise. Fans have asked for accessible and legal ways to play their original Backyard titles for years, and we are excited to deliver. Without having access to the source code, there are hard limitations on the experience we can create. Backyard Baseball '97 runs buttery smooth for iOS devices, looks better than ever, and creates a new installation for digital preservation within the Backyard Sports catalog that allows the next generation of fans to fall in love with the title that started it all.
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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
TypeScript
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.
