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
Cahokia AR Tour
IMPORTANT NOTE: The Cahokia AR Tour is designed ONLY for on-site use at the Cahokia Mounds State Historic Site
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.2
413 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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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 Cahokia AR Tour: map the core Education 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 offline mode for downloaded content.
Assumption to check: Limited offline functionality may hinder learning.
Validate with people who use this workflow before building.
Hypothesis 2
Optimize AR for lower-end devices.
Assumption to check: AR experiences may require high device specifications.
Validate with people who use this workflow before building.
Hypothesis 3
Provide clearer explanations of benefits and features.
Assumption to check: In-app purchases may confuse users.
Validate with people who use this workflow before building.
Hypothesis 4
Add gamification elements like achievements and rewards.
Assumption to check: User engagement may drop due to lack of interaction.
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
IMPORTANT NOTE: The Cahokia AR Tour is designed ONLY for on-site use at the Cahokia Mounds State Historic Site. The app will not function as intended in any other location. ---------- Explore the City of the Sun What it were possible to travel through time? Journey deep into the past? Discover secrets of a people long forgotten? Today, that journey awaits you at the Cahokia Mounds State Historic Site. Through state-of-the-art augmented reality technology see the world of the ancient Mississippian people and their great city of Cahokia come vividly alive. • view ancient structures as they appeared 1000 years ago • discover ancient artifacts • learn about the culture and beliefs of this lost Native American civilization
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
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@react-native-community/geolocation
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.
