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
The Baltimore Sun
Now there's a simple, elegant and customizable way to get all of the Baltimore Sun's exclusive, premium storytelling on your iPhone and iPad.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.5
5,813 ratings · Top 15%
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 included18 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 The Baltimore Sun: map the core News 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
Offer more free content or incentives for users to engage.
Assumption to check: Limited free articles per month
Validate with people who use this workflow before building.
Hypothesis 2
Implement advanced search filters and sorting options.
Assumption to check: Difficulty in finding specific articles
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to download articles for offline access.
Assumption to check: No offline reading feature
Validate with people who use this workflow before building.
Hypothesis 4
Use algorithms to customize the article feed based on user preferences.
Assumption to check: Lack of personalization in the feed
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
Now there's a simple, elegant and customizable way to get all of the Baltimore Sun's exclusive, premium storytelling on your iPhone and iPad. FEATURES: • Stay informed with Baltimore's best source of news, sports, business and entertainment • Sign up for push notifications to get the latest news from our newsroom as soon as stories break • Enjoy exclusive videos and photo galleries • Edit the section list to be in your preferred order • Save must-read stories, photos and videos for when you have the time to enjoy them • Get the latest breaking news from our newsroom in your notifications • Share stories easily with Twitter, Facebook, or email • Offline reading: Download and read content offline SUBSCRIPTION DETAILS: • For full access, try one free month of Unlimited Digital Access to the app, the Baltimore Sun website, and our eNewspaper; then it's only $19.99 a month. Make sure to create a registration while in the app so you'll be able to log in to the website and eNewspaper when you visit them in web browsers. • Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. • Your subscription automatically renews each month unless auto-renew is turned off within your Account Settings at least 24-hours before the end of the current period. • Your iTunes account will be charged $19.99 for renewal within 24-hours prior to the end of the current period. • No cancellation of the current subscription is allowed during active subscription period. • Subscriptions may be managed by the user by going to the user's Account Settings after purchase. • You can read our Privacy Policy here: http://www.tribpub.com/privacy-policy/ • You can read our Terms of Service here: http://www.tribpub.com/central-terms-of-service/ • Questions about your subscription, including adding or removing Web access to the Baltimore Sun website from your app access, can be directed to Customer Service: 888-539-1280. CRASHES / PROBLEMS? We've been working hard to fix any and all crashes in the app. If you're still experiencing crashes or freezes after installing this update, please contact us at [email protected]. A quick email to our support team helps our developers identify and resolve crashes faster.
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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
Zustand
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expo-image
BUILD KIT DIFFICULTY
Expert
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.
