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
Silly Fun Smile Live Wallpaper
Make your phone feel more fun with live wallpapers that truly move.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.4
11,794 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
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A product spec, screen plans, and build steps for your coding agent.
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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 Silly Fun Smile Live Wallpaper: 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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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
Make your phone feel more fun with live wallpapers that truly move. Silly Fun Smile Live Wallpaper brings playful energy to your screen. Enjoy animated backgrounds, smooth motion, and vibrant 4K visuals that make every unlock more interesting. From silly smiles to funky designs, each wallpaper adds personality. Whether you want something funny, bold, or relaxing, there’s a style to match your mood. Explore vibrant live and 4K wallpapers. Switch between different looks anytime and keep your screen fresh. Choose from multiple styles: • Funny and silly smile wallpapers • Funky and colorful designs • Anime and aesthetic backgrounds • Dark, neon, and minimal themes • Nature and abstract visuals Wallpapers are available in HD and 4K quality. Optimized to look sharp, smooth, and eye-catching on your device. Enjoy a seamless experience: • Smooth live wallpaper animations • High-quality video wallpapers • Easy setup for lock screen and home screen • New content added over time Personalize your phone in seconds. Just pick a wallpaper, apply it, and enjoy the transformation. Add a bit of fun, humor, and creativity to your daily experience. Make your screen lively, expressive, and uniquely yours. App Information • All wallpapers are available for free. • The app may display advertisements. UNLIMITED ACCESS MEMBERSHIP SUBSCRIPTION • You can subscribe to all features within Silly Fun Smile Live Wallpaper for unlimited access. • Subscriptions are billed weekly, monthly, or yearly at the rate selected depending on the subscription plan. • You can cancel your subscription via this URL: https://support.apple.com/en-us/HT202039 Privacy Policy: https://sites.google.com/leansoft.io/smile-live-wallpaper-policy/home Terms of Service: https://sites.google.com/leansoft.io/smile-live-wallpaper-term/home
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
Expand the library with user-uploaded content and curated selections.
Assumption to check: Limited variety of wallpapers compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Implement a more user-friendly ad strategy or a premium ad-free option.
Assumption to check: Frequent ads disrupt user experience
Validate with people who use this workflow before building.
Hypothesis 3
Provide more free content or a better trial experience.
Assumption to check: Paywall may frustrate users
Validate with people who use this workflow before building.
Hypothesis 4
Optimize animations for smoother performance on older devices.
Assumption to check: Performance issues with heavy animations
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
Redux
Axios
React Navigation
Firebase
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.
