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
Mockup - UI/UX Design
Mockup helps you sketch, wireframe, and prototype apps and websites across iPad, iPhone, and Mac
Free
PRICE
Free
No in-app purchases
BUSINESS MODEL
Free
No overall Grossing estimate available
RATING
★ 4.4
549 ratings · Top 30%
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.
Your first Build Kit is free with a verified email.
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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 Mockup - UI/UX Design: 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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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.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
Mockup helps you sketch, wireframe, and prototype apps and websites across iPad, iPhone, and Mac. Built specifically for UI/UX design and Apple Pencil, Mockup combines a flexible canvas with reusable UI elements and interactive prototypes in one seamless workflow. Featured by Apple and recognized as App of the Day, Mockup is trusted by 500,000+ designers, developers, and product teams worldwide to sketch and wireframe interfaces faster. Design interfaces for mobile, tablet, desktop, watch, TV, and the web. - Sketch naturally with Apple Pencil using versatile drawing tools and a complete color palette. - Work with 45+ device frames in portrait and landscape. - Draw perfect shapes with Shape Detection and Snap to Grid for cleaner layouts. - Write and edit text directly on the canvas using Scribble. - Customize grids, frames, and backgrounds to match your workflow. Build Better Wireframes - Use ready-to-use UI elements or create, save, and reuse your own custom element sets. - Add text, images, shapes, and over 4,000 SF Symbols. - Save reusable text styles for a consistent design system. - Drag and drop text or images directly from other apps. Prototype User Flows - Connect screens to create interactive flows. - Preview prototypes in full-screen mode. - Validate navigation and user experience before development. Export, Share & Continue Anywhere - Export high-quality PDF and PNG files. - Share Mockup files with other users. - Collaborate in real time using SharePlay. - Sync sketches and projects across iPad, iPhone, and Mac with iCloud. - Access recent sketches and preview your work from Home Screen widgets. Optimized for Apple Pencil & iPad - Use Apple Pencil Hover to preview and switch drawing tools with greater precision and control. - Use Apple Pencil Pro squeeze to access canvas controls, adjust tools, select objects, or undo and redo actions. - Enjoy a desktop-class experience with external keyboard and trackpad support. - Work across multiple windows for greater productivity. Start creating for free with unlimited sketches and projects, or unlock the complete Mockup experience with Mockup Studio. Mockup Studio includes: - All device frames - Interactive prototypes - Unlimited custom element sets - Exclusive UI elements - Shape Detection - 4,000+ customizable SF Symbols - Watermark-free PDF export - PNG export - Nested projects - Priority support Terms of Service: https://apprime.studio/terms-of-service/ Privacy Policy: https://apprime.studio/privacy-policy/
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
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.
