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
Themie: Wallpapers & Theme
Themes - Widget & Wallpapers - the leading fast and professional themes app of 2024 that elevates the visual appeal of your phone with its vast collection of icon changer, top widgets, and aesthetic wallpapers.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.4
25,485 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.
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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 Themie: Wallpapers & Theme: 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
Themes - Widget & Wallpapers - the leading fast and professional themes app of 2024 that elevates the visual appeal of your phone with its vast collection of icon changer, top widgets, and aesthetic wallpapers. Change your home screen with one of our many aesthetic wallpapers, make your home screen look cool with our cool wallpapers and change the look of your phone with themes our favorite topic! Fully customize your phone with our fancy themes app Get ready to transform your home screen into a personalized masterpiece with these exciting features: Stay on top of the latest trends as Themes - Widget & Wallpapers updates regularly, ensuring you have access to fresh and trendy themes to keep your phone's appearance up to date. Themes updates allows you to personalize your home screen with a variety of features and styles ranging from Cute themes, Anime themes, KPOP themes to seasonal themes like Christmas and Halloween and match with every iOS device. Express your unique style and create a visually stunning interface that suits your preferences. 【Many exquisite widgets】 One of the standout features of Themes - Widget & Wallpapers app is its extensive collection of top widgets. Users can choose from a variety of widget styles, sizes, and designs to create a unique and functional home screen. Whether it's displaying the weather or quick access to favorite apps, the widget customization options are diverse and cater to individual preferences. 【HD wallpaper changer】 Themes - Widget & Wallpapers gives you 4K & Full HD wallpaper backgrounds to change wallpaper. And the 4K HD photos are updated daily! 【Diverse icons changer】 Customize your homescreen even further with a wide range of icon changers. From fresh and modern styles to cute, lovely, and fun designs, you'll find the perfect icons to complement your home screen and give it a unique touch. Help you change & customize icons and names for any apps. The new icons can be chosen from gallery, other app icons and lots of personalized icon changer. Our app will create a shortcut to the new icon on your home screen. This is the easiest way to decorate your phone. 【Personalize your own themes, widgets & wallpapers】 The app goes beyond top widgets and HD wallpapers with its theme packs. These pre-designed packs include a cohesive set of wallpapers, icons, and widgets that work together to create a unified and visually pleasing look. Users can choose from a variety of theme packs or mix and match different widgets, app icons to create their own unique themes. 【Easy One-Click Replacement】 Save time and energy with the app's convenient one-click replacement feature. Simply choose your preferred icon changer, themes, widgets, and wallpapers, and with a one click, transform your device's appearance to match your desired aesthetic. An indispensable application for those who like aesthetics ▪ Exquisite app icons! ▪ Super fast update speed! ▪ Diverse themes, app icons! ▪ Personalization just for you! ▪ Easy one-click replacement! ▪ Easy access & Custom widget, app icons give you special interface (UI) Contact us: [email protected] Terms of Services: https://lutech.vn/terms-or-use Privacy Policy: http://lutech.vn/privacy
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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
Introduce user-generated categories or allow users to upload their own wallpapers.
Assumption to check: Limited wallpaper categories can lead to user dissatisfaction.
Validate with people who use this workflow before building.
Hypothesis 2
Simplify the subscription options and provide clear explanations.
Assumption to check: In-app purchase complexity can confuse users.
Validate with people who use this workflow before building.
Hypothesis 3
Add features that allow users to create custom wallpapers or modify existing ones.
Assumption to check: Lack of personalization features.
Validate with people who use this workflow before building.
Hypothesis 4
Optimize image loading and caching for smoother performance.
Assumption to check: Performance issues with loading high-resolution images.
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
React Navigation
Axios
React Query
Shadcn/UI
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.
