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
SwiftBrief
SwiftBrief is a focused speed reading app for PDFs and web articles
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included16 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 SwiftBrief: map the core Productivity 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
Include advanced tagging and categorization features.
Assumption to check: Users struggle with organizing notes effectively.
Validate with people who use this workflow before building.
Hypothesis 2
Implement robust cloud sync with offline support.
Assumption to check: Note syncing can be unreliable.
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to customize note backgrounds and fonts.
Assumption to check: Lack of customization options for notes.
Validate with people who use this workflow before building.
Hypothesis 4
Enhance search functionality with filters and sorting.
Assumption to check: Users find it hard to search through notes.
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
SwiftBrief is a focused speed reading app for PDFs and web articles. No accounts, no cloud uploads — just guided reading that keeps the source document visible while you work through it. Import a PDF from Files, paste a webpage URL, or send content in from the iOS share sheet. From there, a split-view reader guides you through the text one word at a time — with the original document always visible. Pause, adjust your speed, skip back, and pick up exactly where you left off. On supported Apple devices, SwiftBrief can generate on-device document summaries using Apple Intelligence — and open them directly back inside the Reader. No data leaves your device. Adaptive pacing adjusts naturally around longer words and punctuation, so reading feels measured rather than mechanical. Reader settings let you tune speed, font size, accent colour, and more to suit how you work. Your library keeps everything organised with filters, progress tracking, and favourites. The Stats tab tracks words read, time saved, and your reading milestones over time. Everything stays on your device. No sign-in required.
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
Zustand
React Navigation
BUILD KIT DIFFICULTY
Intermediate
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.
