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
Pro Photo Mosaic Creator
Create custom photo mosaics and video mosaics with the #1 Photo Mosaic App! This industry-leading software analyzes the colors and shapes of your pictures in a matter of seconds to create your personalized photo mosai...
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
3,606 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.
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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Combine features and design from your favorite apps.
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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 included17 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 Pro Photo Mosaic Creator: map the core Photo & Video 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
Allow users to adjust tile size and shape.
Assumption to check: Limited customization options for mosaics
Validate with people who use this workflow before building.
Hypothesis 2
Optimize image processing for faster generation.
Assumption to check: Performance lag with larger images
Validate with people who use this workflow before building.
Hypothesis 3
Offer customizable watermark options or an ad-free experience.
Assumption to check: Watermark on free version can be intrusive
Validate with people who use this workflow before building.
Hypothesis 4
Integrate more sharing platforms and options for users.
Assumption to check: Limited 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
Create custom photo mosaics and video mosaics with the #1 Photo Mosaic App! This industry-leading software analyzes the colors and shapes of your pictures in a matter of seconds to create your personalized photo mosaic right before your eyes. Custom settings allow you to personalize your mosaic to suit your specifications. - Use pictures from your device, Facebook, Instagram, Google, Dropbox, or Flickr account - TRUE photo mosaic creation – no ghosting or superimposing - Zoom in to see the details of all of the photos that make up your mosaic - Order high quality prints of all sizes and digital downloads directly through the app - Many advanced personalization and customization options - Create custom video mosaics - download in SD, HD, & 4K resolutions - Share your photo mosaics online through Facebook, Twitter, Instagram, and Pinterest
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
expo-image-picker
@react-native-async-storage/async-storage
axios
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.
