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.
Transit makes it easy to get around your city
Free · In-app purchases
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.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Transit • Subway & Bus Times: 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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Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Transit makes it easy to get around your city. No more waiting. No more guessing when your ride will arrive – our app helps you travel by public transit in 1,000+ cities. With live departure times and real-time vehicle tracking, you’ll always know EXACTLY when your bus or train is coming. With Transit, you can get anywhere without needing a car: • Plan the fastest route from A to B on public transportation • Quickly compare options like bike + rail or bus + subway • Get instant alerts about delays and disruptions • Save your favorite destinations and lines – then plan trips in just one tap! HERE’S WHAT THEY’RE SAYING “Gives you the best route to where you want to go” - New York Times “You won't realize how much time you can save planning until you use this app” - LA Times “Killer app” - Wall Street Journal “MBTA has a favorite transit app – and it's called Transit” - Boston Globe “A one-stop-shop” - Washington Post AND HERE’S THE WORD FROM PUBLIC TRANSIT RIDERS: “Your app was the deciding factor in selling my car.” “Blows Google Maps out of the water.” “The head of our local transit agency recommended this app over the one her agency created.” 6 GREAT THINGS ABOUT TRANSIT: THE BEST REAL-TIME DATA: Using the best transit agency data, GO crowdsourcing data and our in-house ETA prediction engine, we get you the most accurate real-time info possible for all transport modes: bus, subway or metro, train, streetcar, ferry, rideshare and more. Prefer to travel on two wheels? See live bikeshare and scooter locations right on the map. OFFLINE SUPPORT: Bus schedules, stop locations, subway maps and even our trip planner are available offline. When GPS is spotty underground? Use GO and you’ll still get precise ETAs. TRIP PLANNING PAR EXCELLENCE: See fast and easy routes on buses, subways and trains, and even multiple modes in one trip (bus + bike or scooter + metro). Personalize your journey planner in the settings: skip long walks or the modes you’d rather avoid. It’s like using the MTA Bus Time, MTA Train Time, NJ Transit MyBus, SF Next Muni, CTA Bus Tracker, WMATA Next Arrivals, SEPTA app – all in one! GO NAVIGATION*: Use GO to receive departure alarms to catch your bus or train, and get alerted when it’s time to get off or transfer. You’ll also contribute more accurate info and real-time ETAs for other passengers – and rack up points for being the most helpful rider on your line. CROWDSOURCED WISDOM: See what millions of riders say about crowding levels, on-time performance, the best station exits, and more. EASY PAYMENTS: Pay your transit fare and buy bikeshare passes directly in the app in 100+ cities. *Continued use of GPS running in the background can decrease battery life. NOW SUPPORTING 1000+ CITIES INCLUDING: Atlanta, Austin, Baltimore, Barcelona, Boston, Buffalo, Charlotte, Chicago, Cincinnati, Cleveland, Columbus, Dallas, Denver, Detroit, Dublin, Hartford, Honolulu, Houston, Kansas City, Las Vegas, London, Los Angeles, Louisville, Madison, Miami, Milwaukee, Minneapolis, Nashville, New Orleans, New York City, Orlando, Paris, Philadelphia, Phoenix, Pittsburgh, Providence, Portland, Sacramento, Salt Lake City, San Antonio, San Diego, San Francisco, Seattle, Tampa, Washington D.C. 1000+ PUBLIC TRANSIT AGENCIES INCLUDING: AC Transit, Atlanta Streetcar (MARTA), Bee-Line, Big Blue Bus, Caltrain, CapMetro, CATS, CDTA, CTA, CT Transit, DART, DC Metro (WMATA), DDOT, GCRTA, HART, KCATA, King County Metro, LA DOT, LA Metro, LBT, LIRR, Lynx, MCTS, MDOT MTA, Metra, Metrolink, MetroNorth, Miami Dade Transit, NCTD, New Jersey Transit, NFTA, NICE, NYC MTA, OCTA, PACE, PATH, PRT, RTA, RTC Transit, RTD, SEPTA, SF BART, Sound Transit, SORTA/Metro, St. Louis Metro, TANK, TheBus, TriMet, UTA, Valley Metro, Via SEE ALL SUPPORTED CITIES & COUNTRIES: transitapp.com/en/region **Questions or feedback? Browse our help pages: help.transitapp.com, email us: [email protected], or find us on X: @transitapp and Threads/IG: @transit.app**
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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
Assumption to check: Inaccurate real-time data leading to user frustration
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited offline functionality
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Cluttered interface with too many options
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Inconsistent performance during high traffic times
Validate with people who use this workflow before building.
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.