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
Purple Crow For Safari
Purple Crow is a Safari Web Extension that brings third-party emotes, BetterTTV, FrankerFaceZ, and 7TV, to both Twitch and Kick, along with 70+ quality-of-life features.
$0.99
PRICE
$0.99
No in-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.7
3 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.
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 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 Purple Crow For Safari: map the core Entertainment 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 personalized recommendations based on user preferences.
Assumption to check: Limited content discovery features
Validate with people who use this workflow before building.
Hypothesis 2
Add offline download feature for saved content.
Assumption to check: No offline access to content
Validate with people who use this workflow before building.
Hypothesis 3
Enhance profile with multiple profiles and parental controls.
Assumption to check: Basic profile management
Validate with people who use this workflow before building.
Hypothesis 4
Integrate social sharing features to share favorite content easily.
Assumption to check: Limited social sharing options
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
Purple Crow is a Safari Web Extension that brings third-party emotes, BetterTTV, FrankerFaceZ, and 7TV, to both Twitch and Kick, along with 70+ quality-of-life features. SUPPORTED PLATFORMS - Twitch (twitch.tv) - Kick (kick.com) EMOTES - Full BetterTTV, FrankerFaceZ, and 7TV emote support - Live emote updates via 7TV EventAPI - 7TV badges and username paints - Emote menu picker with search - Tab completion with carousel preview - Colon autocomplete (type :name to see matches) - Animated emote toggle CHAT - Split chat with alternating backgrounds (11 themes) - Per-user color-coded message backgrounds - Readable color adjustment for dark usernames - Timestamps, spoiler tags, first-time chatter highlights - Show deleted messages with strikethrough - Mention highlights and keyword filters - Spam filter with configurable threshold - Spam combo widget, see hype trains forming live - Hide known bot messages - Custom nicknames for any user - Chat search with prev/next navigation - YouTube, image, and Twitch clip link previews - Slow mode countdown timer - Custom font and font size - User pronouns display - Enhanced user cards with account age, follow date, and username history PLAYER - VOD real-time clock - Force video quality (160p to Source) - Disable autoplay - Auto theater mode - OLED pure-black background - Transparent chat overlay in theater mode - Picture-in-Picture button and keyboard shortcut on Twitch and Kick - Silent raid blocker, stays on your channel automatically AUTO-CLAIM - Channel points, automatically clicks the bonus button - Drops, claims available drops via API - Moments, claims streamer Moments - Watch streaks, claims streak bonuses CUSTOMIZATION - Custom CSS, power-user textarea to inject your own styles - Move chat to left side - Custom chat width via drag handle - Draggable floating settings button on iPhone - 33 languages supported MORE - Anonymous viewing, hide from the viewer list - Lurk mode, grey out chat to prevent accidental messages - Auto-expand followed channels sidebar - Channel hover previews - Watch time tracker - Quick timeout buttons for moderators - Hide UI clutter (bits, hype chats, channel leaderboard, promos) - Unwanted game/channel filter - "What's New" sheet on update PRIVACY Purple Crow collects zero data. No analytics, no telemetry, no accounts. All settings are stored locally on your device. The only network requests are to emote provider APIs (BTTV, FFZ, 7TV) to load emotes. DISCLAIMER Purple Crow is an independent Safari extension and is not affiliated with, endorsed by, or sponsored by Twitch, Kick, BetterTTV, FrankerFaceZ, or 7TV. All trademarks and brand names are the property of their respective owners and are used only to describe the services this extension works with.
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/native
Supabase
react-native-reanimated
expo-linear-gradient
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.
