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
MBTA mTicket
Buy a ticket anywhere, anytime - in seconds
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 2.6
621 ratings · Below Average
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/
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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 MBTA mTicket: 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
Add more payment integrations like Apple Pay, Google Pay.
Assumption to check: Limited payment options for users
Validate with people who use this workflow before building.
Hypothesis 2
Create a more streamlined and user-friendly interface.
Assumption to check: User interface is confusing and cluttered
Validate with people who use this workflow before building.
Hypothesis 3
Implement real-time updates for ticket availability.
Assumption to check: Inconsistent ticket availability updates
Validate with people who use this workflow before building.
Hypothesis 4
Integrate an in-app chat feature for instant support.
Assumption to check: Slow customer support response times
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
Buy a ticket anywhere, anytime - in seconds. The Official MBTA mTicket App is like a ticket office in your pocket. Your smartphone is your ticket! With the new MBTA mTicket App for Commuter Rail and Ferry, you can securely purchase MBTA Commuter Rail and Ferry Single Ride, Round-Trip, and 10 Ride tickets in seconds. Purchasing a ticket is easy: select your trip & ticket type, enter your payment card information and your smartphone is your ticket! Never lose your ticket again! Once you purchase your ticket, it will always stick in My Tickets. Need to replace your phone? No problem -- we can easily transfer any purchased ticket. Want to check your schedule or service updates? You can check schedules and T-Alerts right from inside the app! We are making the app better everyday! Let us know what you think at www.mbta.com/mticket Features: ● Secure ticket purchasing with your credit or debit card ● Your smartphone is your ticket ● Never worry about zones again -- just select your origin and destination to purchase ● Never lose your ticket -- tickets can be easily transferred if your phone is lost or stolen ● Check Commuter Rail schedules, maps, and service alerts ● Brand new offers from JustRide and the MBTA
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
Axios
React Navigation
React Native Paper
React Native QR Code SVG
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.
