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 Bulwark
The Bulwark App is for Bulwark+ members and features an ad-free environment to read, watch or listen to your favorite Bulwark commentators
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.9
2,358 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.
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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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 The Bulwark: 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
Implement advanced search filters and sorting options.
Assumption to check: Difficulty finding specific articles due to limited search filters.
Validate with people who use this workflow before building.
Hypothesis 2
Add offline access to saved articles.
Assumption to check: Limited offline reading capabilities.
Validate with people who use this workflow before building.
Hypothesis 3
Make paywall clearer and add a trial period.
Assumption to check: In-app purchases can be confusing or unclear.
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to adjust text size, font, and background color in settings.
Assumption to check: Not enough customization options for the reading experience.
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
The Bulwark App is for Bulwark+ members and features an ad-free environment to read, watch or listen to your favorite Bulwark commentators. The app was designed with members in mind and includes new features to enhance your subscriber experience: • Read to me - listen to articles on the go • Save articles or shows for later • A “For You” feed where you can follow what you love • Audio-only versions of all our shows • Resize text • Switch to dark mode • Dedicated Read tab • Dedicated Watch & Listen tab Bulwark+ is powered by Substack. Use your Substack profile to sign in to the app to get unfettered access to everything we publish and engage with The Bulwark community in the comments. About Us The Bulwark is home to Sarah Longwell, Tim Miller, Jonathan V. Last, Sam Stein, Catherine Rampell and more. We are the largest pro-democracy bundle on Substack for news and analysis. The Bulwark was founded to provide analysis and reporting in defense of America’s liberal democracy. We publish written articles and newsletters. We create podcasts and videos. We publish political analysis from experts. We’re supported in this effort by a community built on good faith who know that the only way through is together.
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
Zustand
@supabase/supabase-js
react-native-fast-image
expo-router
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.
