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
Hat Booth
Virtually try on fun and wild Hats using Hat Booth
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.7
1,099 ratings · Top 15%
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 Hat Booth: 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
Regularly update the app with new hat designs and styles.
Assumption to check: Limited hat options may lead to user boredom.
Validate with people who use this workflow before building.
Hypothesis 2
Optimize image processing algorithms for better performance.
Assumption to check: Photo processing can be slow or inaccurate.
Validate with people who use this workflow before building.
Hypothesis 3
Simplify the purchase process with clearer prompts and a better UI.
Assumption to check: In-app purchase flow can be confusing.
Validate with people who use this workflow before building.
Hypothesis 4
Integrate social sharing options to enhance engagement.
Assumption to check: Users may lose interest without social sharing features.
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
Virtually try on fun and wild Hats using Hat Booth. Now you can add a King's Crown, Princess Tierra, Cowboy Hat, Top Hat and many many more hats to any photo! Add a fun hat to any picture. Try it on your pets, your family and your friends. Have even more fun putting these fun hats on a celebrity photo! Hat Booth is EASY to use and fun for the whole family! Simply load any photo into Hat Booth and start adding hats to the photo using simple touch and adjust logic. Load a photo from your photo album or take a new photo with the built in camera. Then scroll through all the hats, when you find one you want to try on simply tap the hat and it is added to your photo. You can adjust the placement, size and rotation of the hat so it will match your picture perfectly. Reviews - Featured in "Hat Life" magazine! - "Hysterical - Great variety of hats. Realistic looking hats. Very fun! Can't stop playing it! Would love a variety of American Indian head gear. Thanx!" - "Awesome - Nice easy to use interface, tons of fun hats. Worth every penny!" Features - Universal App for iPad and iPhone - Over 170 fun hats to choose from! - Choose from 8 different hat categories. - Load any photo from the photo album or take a new picture with the built in camera - Adjust the size and rotation of the picture. - Adjust the size, rotation and the placement the hat to make the hat match your photo. - Add multiple hats to your photo - Share via email, Facebook, Twitter, iMessage and Instagram - Save the picture to your photo album Advanced Editing Tools - Eraser, erase parts of the hats - Blur, blur the hat to match your photo - Color, adjust the color of the hat - Layers, access the different hats added to your photo through the layer menu - Flip, change the orientation of the hat - Opacity, make the hat see through, great for using with the eraser. - Brightness, adjust the brightness of the hat - Width and Height, adjust individually to make the hat fatter or taller. - ZOOM, zoom in to make fine edits - Add Text, easily meme your photo by adding text from our text editor, edit the text with the same great tools you use for your hat. Got Twitter? Follow us @appdicted
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
Zustand
React Navigation
Expo Image Picker
React Native Vector Icons
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.
