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
Steal Sign Stealer
Decode and steal your opponents steal signs using the Steal Sign Stealer!
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.5
48 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 included14 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 Steal Sign Stealer: map the core Productivity 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 more fonts, colors, and styles for user flexibility.
Assumption to check: Limited customization options for signs
Validate with people who use this workflow before building.
Hypothesis 2
Introduce sharing options for users to collaborate on signs.
Assumption to check: No collaboration features
Validate with people who use this workflow before building.
Hypothesis 3
Simplify the pricing model and clarify what each purchase includes.
Assumption to check: In-app purchases can be confusing
Validate with people who use this workflow before building.
Hypothesis 4
Expand the library of templates to cater to more user needs.
Assumption to check: Limited templates available
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
Decode and steal your opponents steal signs using the Steal Sign Stealer! Using a few easy steps, you'll be on your way to victory. Here's how it works: [1.] Record the signs that the opposing team is giving by tapping the sign buttons. [2.] Record the outcome of the play, whether the player on base stole or not. [3.] Repeat, and train the app to learn the signs. [4.] After a few times, the app will begin to predict what the team's steal sign is. Keep going, and the app could also pick up wash signs as well! Note: [x] You can customize the buttons to be any sign the team is giving, such as touching your hat, or clapping your hands. [x] "Wash sign" refers to a sign at the end of a sequence of signs which means all signs before are cancelled [x] Please be sure to always follow your league's rules. We do not encourage cheating, and are not responsible if you get in trouble using the Steal Sign Stealer. This app is intended for entertainment purposes.
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
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@react-native-community/slider
react-native-modal
BUILD KIT DIFFICULTY
Starter
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.
