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
Hazumi for Hacker News
Meet your new favourite way to browse Hacker News (HN) – a sleek, modern reader built for tech enthusiasts
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.8
5 ratings · Top 50%
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/
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 Hazumi for Hacker News: 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 folders or tags for saved articles.
Assumption to check: Limited article saving options.
Validate with people who use this workflow before building.
Hypothesis 2
Add offline access to saved articles.
Assumption to check: No offline reading feature.
Validate with people who use this workflow before building.
Hypothesis 3
Develop an algorithm for personalized news feeds.
Assumption to check: Lack of personalization in article recommendations.
Validate with people who use this workflow before building.
Hypothesis 4
Enhance UI with modern design elements and animations.
Assumption to check: Basic UI design.
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
Meet your new favourite way to browse Hacker News (HN) – a sleek, modern reader built for tech enthusiasts. Stay on top of everything in tech, coding, and AI with push notifications, summaries, bookmarks, powerful search, and more – all from your iPhone or Apple Watch. • Sleek Design: Enjoy a clean, beautiful interface that keeps the focus on content • Real-Time Alerts: Get push notifications for top HN stories, so you never miss the hottest news in tech • AI-Powered Summaries: Quickly grasp the essence of articles with concise AI-generated summaries, ensuring you never miss critical insights • Bookmarks: Save your favorite posts to read later and catch up at your own pace • Powerful Search: Instantly find any story or comment – whether it’s about coding, AI, or any other tech topic • All-New Home Screen: Flip through posts one by one in a gorgeous full-screen feed with smooth haptic feedback on every swipe (on both iPhone and Apple Watch) • Apple Watch Support: Catch up on Hacker News from your wrist – browse top stories and get alerts on your Apple Watch Don’t miss out on the future of tech – download now and join the Hacker News community on the go! Privacy policy can be found here: https://github.com/zumistudios/hazumi-pub/blob/main/privacy-policy.md EULA (end-user license agreement) can be found here: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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
axios
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.
