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
Banish - Block 'Open in App'
BANISH
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.7
262 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 Banish - Block 'Open in App': map the core Utilities 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 advanced blocking options, such as blocking entire domains.
Assumption to check: Limited URL blocking functionality compared to competitors.
Validate with people who use this workflow before building.
Hypothesis 2
Implement better algorithms for URL detection.
Assumption to check: Inconsistent performance with certain URLs.
Validate with people who use this workflow before building.
Hypothesis 3
Add notifications or confirmations when a URL is successfully blocked.
Assumption to check: Lack of user feedback on blocking action.
Validate with people who use this workflow before building.
Hypothesis 4
Provide customizable settings for blocking rules.
Assumption to check: No option for user-customized settings.
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
BANISH. The #1 Safari Extension to block annoying 'Open in App' popups & other dark patterns on the web. “Banish does one thing and does it well: it nukes dickpanels in Safari on iPhone and iPad” — John Gruber, Daring Fireball "The app proved incredibly useful. For instance, when on Quora, clicking a link to another Quora page would normally pop up a blocker that requires you to log in to continue navigating the website. With Banish, this pop-up was gone and you could use the site normally" — Sarah Perez, TechCrunch PRIVATE Banish does not collect or store any of your data - nothing leaves your device. BUY ONCE Just a one-time purchase and Banish is yours. No subscriptions, no in-app purchases, no ads, no nonsense. FAST The app performs the minimal, necessary changes to block popups and free up screen space. SIMPLE It's as easy as downloading the app and enabling it in Safari settings. No maintenance needed. MODERN Banish is written in Apple's latest programming paradigm Swift UI and Safari Extension functionality. --- NOTE: Even with Banish, Smart Banners can still appear at the top for apps you have installed. They can't be removed because they're built into Safari. Need Help? Contact us at [email protected]
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
React Navigation
Async Storage
React Native Elements
Clipboard API
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.
