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
OneBusAway
When's my bus? OneBusAway answers that question in real time, at every stop, across your whole region.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
1,549 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 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 OneBusAway: map the core Navigation 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 better data sourcing and validation.
Assumption to check: Inaccurate real-time arrival information
Validate with people who use this workflow before building.
Hypothesis 2
Expand to more transit systems and regions.
Assumption to check: Limited area coverage
Validate with people who use this workflow before building.
Hypothesis 3
Simplify design and make key features more prominent.
Assumption to check: Cluttered user interface
Validate with people who use this workflow before building.
Hypothesis 4
Introduce offline mode for previously accessed data.
Assumption to check: Lack of offline access
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
When's my bus? OneBusAway answers that question in real time, at every stop, across your whole region. Now with Live Activities: start tracking a ride and watch it approach from your Lock Screen, without opening the app. Free, open source, and built by a nonprofit in partnership with your transit agency. WHAT'S NEW - Live Activities — follow your bus, train, or ferry from the Lock Screen and Dynamic Island. - A redesigned stop view that opens right from the map, putting real-time arrivals one tap away. FEATURES - Real-time arrivals wherever your agency provides them. - Departure alarms that nudge you before your ride pulls away. - Trip planning with door-to-door directions across every agency in your region. - See where your vehicle actually is on the map — buses, trains, ferries, streetcars, even funiculars. - Home Screen and Lock Screen widgets for the routes you check most. - Bookmarks and recent stops, so your daily commute is always a tap away. - Nearby stops found automatically, or search by route, address, or stop number. - Service alerts from your agency, right where you need them. WHERE ONEBUSAWAY WORKS - Davis, CA - New York, NY - San Diego, CA - Seattle / Tacoma / Puget Sound, WA - Tampa, FL - Washington, D.C. - Adelaide, Australia ABOUT OneBusAway is free and open source, maintained by transit riders and researchers since 2008. There are no ads and no account to create. The app is published by the Open Transit Software Foundation, an IRS-registered 501(c)(3) nonprofit that has earned Silver Transparency status on Candid. Questions, feedback, or support: https://onebusaway.org/ OTSF on Candid: https://www.guidestar.org/profile/84-1786969
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
Supabase
React Navigation
Axios
@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.
