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
Wallcraft – Wallpapers, live
Looking for high-quality wallpapers for iPhone?
Free
PRICE
Free
No in-app purchases
BUSINESS MODEL
Free
No overall Grossing estimate available
RATING
★ 4.6
162,784 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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included15 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 Wallcraft – Wallpapers, live: 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
Enhance search and filtering options for better user experience.
Assumption to check: Limited wallpaper categories and search functionality
Validate with people who use this workflow before building.
Hypothesis 2
Implement a user review system to rate wallpapers.
Assumption to check: Quality of wallpapers can vary
Validate with people who use this workflow before building.
Hypothesis 3
Offer an ad-free premium subscription for a better experience.
Assumption to check: Ads can be intrusive in free apps
Validate with people who use this workflow before building.
Hypothesis 4
Optimize image loading and caching for faster access.
Assumption to check: Slow loading times for high-resolution images
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
Looking for high-quality wallpapers for iPhone? To fit the parallax size? Want cool Live Wallpapers in 4K and HD quality? To see every day a lot of new wallpapers? You just found this app! Wallcraft / Wallpaperscraft - a completely new level of approach to wallpaper. Only suitable wallpapers for the resolution of your iPhone. Live wallpapers or usual wallpapers, you'll see only the best. We have artists who draw for you almost every day! Exclusive wallpapers, Double, Live and Video wallpapers that available only in Wallcraft! AMAZING! Adaptive sizes and parallax wallpapers sizes and live wallpapers for: - iPhone 14, iPhone 14 PRO – iPhone 12, iPhone 12 mini, iPhone 12 PRO and iPhone 12 PRO Max – iPhone 11, iPhone 11 PRO and iPhone 11 PRO Max – iPhone XS Max – 13000+ wallpapers for parallax size! – iPhone XS – 15000+ wallpapers – iPhone XR – 18000+ – iPhone X – 15000+ – iPhone 8, 7+, 6S+, 6+ – 12000+ – iPhone 8, 7, 6S, 6 – 19000+ – iPhone SE, 5S, 5C, 5 – 36000+ – iPhone 4S,4 – 65000+ OMG! We really did it, check it out yourself. – All wallpapers crop for iPhones screen manually by a specially trained person. – Every hour we publish a new wallpaper. – For each iPhone model, you will see a different number of wallpapers, since we select from our database only those suitable for the screen size of your phone. In Wallcraft you will find wallpapers by categories: – 3D – Abstract – Animals – Anime – Art – Cars – City – Dark wallpapers / Black wallpapers – Fantasy – Food – Girls – Holidays – Love wallpapers – Macro – Men – Minimalism wallpapers – Music – Nature – New Year wallpapers / Christmas wallpapers – Other – Space – Sport – Technology – Textures – Vector – Video Wallpapers – Words / Quote wallpapers / Text wallpapers One more thing... SUBSCRIPTION PRICING AND TERMS Order one of our Wallcraft PRO plan to remove all ads and unlock all exclusive wallpapers. Wallcraft PRO 1 year - $4.99 / per 1 year Wallcraft PRO forever - $12.99 / forever * The price is for US. Price may be different for other countries. - Payment will be charged to your Apple ID account at the confirmation of purchase. - Subscription automatically renews unless it is canceled at least 24 hours before the end of the current period. - Your account will be charged for renewal within 24 hours prior to the end of the current period. - You can manage and cancel your subscriptions by going to your account settings on the App Store after purchase. Terms of Use: https://volkraft.com/term_of_use Privacy Policy: https://volkraft.com/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
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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.
