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
Rome Eternal - City Self Tour
Rome Eternal is SelfTour’s newest GPS assisted walking tour and first outside of the U.S., uses your smartphone to lead you with turn-by-tour Voice Guidance through one of the most visited cities in the world!
$9.99 · In-app purchases
PRICE
$9.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.6
8 ratings · Top 50%
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 included18 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 Rome Eternal - City Self Tour: map the core Travel 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
Include multiple language support and user-generated content for audio guides.
Assumption to check: Limited audio guide options
Validate with people who use this workflow before building.
Hypothesis 2
Improve search and filter functionality for easier navigation.
Assumption to check: Difficulty in finding tours
Validate with people who use this workflow before building.
Hypothesis 3
Implement a review system for users to share experiences and feedback.
Assumption to check: Lack of user reviews
Validate with people who use this workflow before building.
Hypothesis 4
Provide clearer information on what each in-app purchase includes and its benefits.
Assumption to check: In-app purchase confusion
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
Rome Eternal is SelfTour’s newest GPS assisted walking tour and first outside of the U.S., uses your smartphone to lead you with turn-by-tour Voice Guidance through one of the most visited cities in the world! - A complete circle walk of Rome’s most famous ancient, romantic and hard-to-find sites plus Vatican City. - Visit over 50 historically significant and famous locations, palaces and plazas, including the Forum, Trevi Fountain, Spanish Steps, Piazza Navona, Pantheon, Castel Sant’ Angelo, St. Peter’s Basillica, the Campo de Floria outdoor market, and stroll down the Via Corso where visiting Kings once made their grand entries into Rome. - Hear a recreation of the sounds of a parade of soldiers victoriously returning to ancient Rome once the most powerful city in the world. - Plus fascinating tales of the historic characters who lived here over the city’s 2000+ years of history. A Delightful Experience! Talented voice actors, including a native Italian who brings his own personal input, perform the descriptions. The style is entertaining, underscored with classic Italian music. The descriptions have been thoroughly researched providing accurate information. Photos of each location verify you are looking at what is being described. It is an experience you will long remember for a fraction of the cost of other tours. You’re in control! The easy-to-use exclusive SelfTour™ smartphone system ensures an enjoyable, stress free, full-circle walking tour on your own schedule, at your own pace. No waiting for others! You can join the tour at any location, stop anywhere along the way to enjoy some traditional Italian food, or just a glass of wine, and continue again. And it is a complete circle tour so you end up where you started. The GPS always shows you where you are so you can’t get lost. There are no advertisements and an Internet connection is not needed. Just download and go! For more information go to our website SelfTour.Guide. Here you’ll also discover more great SelfTour audio walks, and drives… and you can leave us your comments. If there’s a tour worth taking, it’s worth taking a SelfTour! Now… walk through Eternal Rome! ### SelfTour™ is a trademark of SelfTour Audio Adventures
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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
react-navigation
expo-maps
@supabase/supabase-js
BUILD KIT DIFFICULTY
Intermediate
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.
