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
Halloween Collage
With this app, you can create your own Halloween Collage - Greeting cards.
$1.99
PRICE
$1.99
No 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.
Build your own version
Build Kit
Make this idea yours
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Add to a Remix
Combine features and design from your favorite apps.
Queued for a daily kit update.
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Make it yours Optional
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included
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 Halloween Collage: map the core Graphics & Design workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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Continue in Rork >
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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
With this app, you can create your own Halloween Collage - Greeting cards. - Personalize your greeting cards by adding stickers, photos or emojis. - Compose your own greetings. - Choose a gradient background color, shadows, opacity, font, orientation. - Send it with Facebook, Messenger, Twitter, WhatsApp, Messages, email and more! - Save the greeting card in your photos library. How to edit a Greeting card? : - Long press to edit an object and move an object in front of another. - Scale and rotate an object with 2 fingers (pinch and rotate gestures). - Drag and move an object with 1 finger (pan gesture). - Double tap to edit an object. - Tap with 1 finger to show or hide toolbars. ========================== Developed and packaged by Ghislain Fortin. Images edited by Isabelle Dextraze. http://ghislainfortin.wixsite.com/mobile-apps --------------------------------------- Cliparts supplied by Openclipart. https://openclipart.org Creative Commons License CC0 1.0 Universal (CC0 1.0) --------------------------------------- Images supplied by Pixabay. https://pixabay.com Creative Commons License CC0 1.0 Universal (CC0 1.0) --------------------------------------- Noto Color Emoji font artwork provided by Google. Noto is a trademark of Google Inc. Noto fonts are open source. https://github.com/googlei18n/noto-emoji/ Apache License Version 2.0 http://www.apache.org/licenses/ --------------------------------------- Flags emoji artwork is provided by Emojitwo, originally released as Emojione 2.2 by Ranks.com with contributions from the Emojitwo community and is licensed under CC-BY 4.0. https://www.emojione.com https://github.com/EmojiTwo/emojitwo Creative Commons Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ --------------------------------------- Color Picker Popover Example Copyright © 2014 Ethan Strider https://github.com/EthanStrider/ColorPickerExample MIT license: http://opensource.org/licenses/MIT --------------------------------------- Swift Core Image Filter Copyright (c) 2015 PrashantKumar Mangukiya https://github.com/PrashantMangukiya/SwiftCoreImageFilter MIT license: http://opensource.org/licenses/MIT --------------------------------------- Some icons supplied by Icons8. https://icons8.com Creative Commons Attribution-NoDerivs 3.0 Unported. https://creativecommons.org/licenses/by-nd/3.0/ --------------------------------------- ACEDrawingView Copyright (c) 2016 Stefano Acerbetti https://github.com/acerbetti/ACEDrawingView MIT license: http://opensource.org/licenses/MIT Apache License Version 2.0 http://www.apache.org/licenses/ --------------------------------------- TOCropViewController Copyright (c) 2015-2020 Tim Oliver https://github.com/TimOliver/TOCropViewController MIT license: http://opensource.org/licenses/MIT --------------------------------------- ChromaColorPicker 2.0 Copyright (c) 2016 Jonathan Cardasis https://github.com/joncardasis/ChromaColorPicker MIT license: http://opensource.org/licenses/MIT --------------------------------------- YPImagePicker Copyright (c) 2016 ytakzk https://github.com/Yummypets/YPImagePicker MIT license: http://opensource.org/licenses/MIT --------------------------------------- Palette Copyright (c) 2019 Egor Snitsar https://github.com/galandezzz/Palette MIT license: http://opensource.org/licenses/MIT --------------------------------------- DeviceKit Copyright (c) 2015 Dennis Weissmann https://github.com/devicekit/DeviceKit MIT license: http://opensource.org/licenses/MIT
Written user reviews are not shown here. Check current App Store reviews >
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
Competitive pricing with generous free tier
Assumption to check: Expensive subscription
Validate with people who use this workflow before building.
Hypothesis 2
Focus on most-requested features first
Assumption to check: Missing features
Validate with people who use this workflow before building.
Hypothesis 3
Optimize for 60fps, fast load times
Assumption to check: Poor performance
Validate with people who use this workflow before building.
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
RevenueCat
BUILD KIT DIFFICULTY
Not assessed in a Build Kit yet.
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.
