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
ButtonUp
Try on clothes before you buy them.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
781 ratings · Top 5%
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 ButtonUp: map the core Shopping workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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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
Try on clothes before you buy them. ButtonUp lets you see how any outfit looks on you, straight from a screenshot. Upload a photo of something you love and get a hyper-realistic image of yourself wearing it in seconds. You can even try on different hairstyles to complete the look. How it works: 1. Screenshot any item you like, from a website, social post, or photo. 2. Upload it to ButtonUp and instantly see it on you. 3. Shop top brands right inside the app and try on outfits as you browse. 4. Save looks to your Gallery to compare fits, plan outfits, and share with friends. Why you'll love it: • Try on clothes from a single screenshot • Try on hairstyles to find your next look • Shop your favorite brands without leaving the app • Build a Gallery of every try-on and favorite outfit • See the drape, silhouette, and fit on your own body, so there's no more guesswork Free vs. Pro: The free version lets you discover new styles and view your Gallery. ButtonUp Pro unlocks unlimited try-ons from your camera roll and while shopping in the app, plus premium features as they launch. Subscription & terms ButtonUp Pro is an optional subscription. Payment is charged to your Apple ID at confirmation of purchase, and the subscription renews automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store settings. Any unused portion of a free trial is forfeited upon purchase. TERMS: https://buttonup.app/terms-of-service
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
Implement an intuitive category filtering system with better visual cues.
Assumption to check: Users often find it hard to navigate through multiple product categories.
Validate with people who use this workflow before building.
Hypothesis 2
Integrate more payment methods like PayPal and Google Pay.
Assumption to check: Limited payment options can frustrate users.
Validate with people who use this workflow before building.
Hypothesis 3
Optimize images for faster loading and improve overall performance.
Assumption to check: Users report slow loading times for product images.
Validate with people who use this workflow before building.
Hypothesis 4
Implement a recommendation engine based on user preferences and browsing history.
Assumption to check: Lack of personalized recommendations leads to missed sales.
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
Zustand
React Navigation
React Native Reanimated
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.
