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
Pincase - A Pinboard.in client, that is simple, elegant and powerful, perfect for managing your daily discoveries.
Pincase is a simple, elegant and powerful bookmarking client for Pinboard, perfect for managing your daily discoveries.
$3.99 · In-app purchases
PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.5
42 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/
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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 Pincase - A Pinboard.in client, that is simple, elegant and powerful, perfect fo: 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
Allow users to customize pin appearance with themes and layouts.
Assumption to check: Limited customization options for pins
Validate with people who use this workflow before building.
Hypothesis 2
Implement offline reading and caching for saved pins.
Assumption to check: No offline access for saved pins
Validate with people who use this workflow before building.
Hypothesis 3
Simplify UI with better spacing and grouping of elements.
Assumption to check: User interface can feel cluttered
Validate with people who use this workflow before building.
Hypothesis 4
Optimize image loading and data fetching to enhance performance.
Assumption to check: Inconsistent performance with loading 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
Pincase is a simple, elegant and powerful bookmarking client for Pinboard, perfect for managing your daily discoveries. "It’s universal, and it is ready for iOS 7. Oh, and it looks lovely too. What more could you need for managing and reading your bookmarks." - Cult of Mac Pincase has also been featured in AppAdvice and GridWriter. ### Are you a Pinboard.in user? ### Do you manage your bookmarks online, using Pinboard.in?? If so, Pincase is for you. Pincase provides powerful bookmark management features for organizing and browsing your bookmarks. Pincase also helps you discover new content from the web, using public data from users on Pinboard. The public bookmark timeline shows you bookmarks with thumbnails and descriptions, so that you will never waste your precious time, trying to open something you are not interested in. ### You can bookmark, even from other apps ### Pincase provide you 2 features for adding bookmarks. With the background bookmarking feature, Pincase allows you to add bookmarks only by copying the URL of the site you want to bookmark, and this can be used from ANY app. Pincase also has a customizable bookmarklet that helps you addding bookmarks from your favorite browser. ### Pincase is UNIVERSAL ### Pincase works on all iOS devices, including iPad series. ### Pincase comes with these great features ### Bookmarking features: - Browse bookmarks - Filter by tags, keywords, year and month, domains, read/unread, public/private. - Quick update (tagging, marking read/unread/public/private/ deleting) - Update multiple bookmarks at once - Unread management - Scheduled "reading time" reminder - Add bookmark from other apps using background bookmarking and bookmarklet Public bookmark browsing: - Browse public bookmarks on Pinboard (Recent/Popular/Network/Japanese/Wikipedia/Fandom) - Trending Tag - Follow tags and create your favorite timeline Other features: - Readability / Instapaper reading mode - Automatic "mark as read" - Open in Mobile Safari / Google Chrome - Bookmarklet customizer Available sharing destinations: - Twitter - Facebook - Google+ - Pocket - Readability - Instapaper - Hatena Bookmark Available in: - English - Japanese ### For more information ### Visit us and learn more on: http://pincaseapp.com/ Follow us on Twitter: https://twitter.com/pincaseapp
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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
Supabase
Zustand
React Navigation
Axios
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.
