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
Streets Pro
Streets Pro is a digital book test that uses a map on a borrowed phone.
$74.99 · In-app purchases
PRICE
$74.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
21 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 included16 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 Streets Pro: map the core Entertainment 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
Introduce advanced filtering and personalized recommendations.
Assumption to check: Limited content discovery features
Validate with people who use this workflow before building.
Hypothesis 2
Offer a subscription model for easier access.
Assumption to check: High price point for initial purchase
Validate with people who use this workflow before building.
Hypothesis 3
Integrate forums or chat features for user interaction.
Assumption to check: Lack of community engagement tools
Validate with people who use this workflow before building.
Hypothesis 4
Enable offline access to saved artworks and locations.
Assumption to check: Limited offline capabilities
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
Streets Pro is a digital book test that uses a map on a borrowed phone. You'll be able to perform multiple effects with a map, both in person and remotely: - Predict which location a spectator will select in advance. - Determine which street name a spectator is merely thinking of. - Reveal information about a freely chosen local area. For example: - You send a spectator a link to a pin on a map. They’re told not to look just yet. - Have them name ANY location. - They look at the map to see that the prediction was correct. And then... - Have your spectator zoom in to the map to ANY location in the world and think of a street name. - You'll be able to tell them the street name, plus information about the local area such as restaurants and cafés, and much more! Streets Pro includes the most advanced peek screen ever created. This is a fully customisable display with multiple sources of information which adapts depending on relevance. Including: - A minimap. - POI lookup. - Address + ZIP/Postcode lookup. - Transgressive (progressive) anagram generator. Streets Pro also includes pro-level features such as: - Live Peek - see what is being typed in real-time. - Enhanced Touch To Peek. - QR code pairing support. - NFC tag pairing support. - Predict-to-pair functionality. - Apple Watch support. - Earpiece support. - Local notifications. * Works with ANY borrowed modern smartphone, tablet or computer. * You NEVER touch their phone! * VERY easy to perform. * NO accomplice required. * NO memory work needed. * Works in multiple languages including English, German, Spanish, French, Italian, Portuguese, Finnish, Swedish, Traditional Chinese, Vietnamese, Arabic, Thai, Russian, Hebrew, Polish and Dutch. "When I came up with my streets book test years ago, I thought it was a beast... Marc has taken that seed and grown a monster! Phenomenal." - John Archer. This app is for entertainment purposes only. Video and audio broadcasting of any description (including TV, radio and Internet) of this effect is prohibited without the written consent of its creator.
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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 Navigation
Expo Location
Axios
React Query
Zustand
Shadcn/UI
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.
