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
Emoji Battery Charging
Make your iPhone battery look more personal with Emoji Battery Charging
Free
PRICE
Free
No in-app purchases
BUSINESS MODEL
Free
No overall Grossing estimate available
RATING
★ 4.4
5,121 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.
First kit free with a verified email
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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 included15 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 Emoji Battery Charging: 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 iPhone battery look more personal with Emoji Battery Charging. Choose a playful battery icon for the status-bar area, then pick a charging theme that fits your mood. DIY BATTERY Browse a variety of decorative battery icons created to complement the status-bar area of your iPhone. Switch styles whenever you want a cute, colorful, minimal, or expressive new look. DIY CHARGING Choose a custom charging visual from a diverse theme collection. Refresh the look of your charging moments and match it with your current phone style. MADE FOR EASY PERSONALIZATION • Explore multiple battery icon themes • Choose a design that fits your mood • Preview different battery looks • Browse custom charging themes • Refresh your style whenever you like Emoji Battery Charging focuses on two simple ways to personalize your iPhone: decorative battery icons and themed charging visuals. Pick a look, preview it, and make everyday battery moments feel more like you. Important: The app provides decorative designs for the battery/status-bar area and does not replace or modify Apple's native iOS system battery icon. Privacy Policy: https://sites.google.com/leansoft.io/emoji-battery-charging/home Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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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
Provide a wider variety of emojis and customization options.
Assumption to check: Limited emoji selection compared to other apps
Validate with people who use this workflow before building.
Hypothesis 2
Implement sharing features for users to share their custom animations.
Assumption to check: No ability to share animations
Validate with people who use this workflow before building.
Hypothesis 3
Add options for users to customize the app's interface and experience.
Assumption to check: Lack of personalization settings
Validate with people who use this workflow before building.
Hypothesis 4
Introduce visual feedback while charging to enhance user engagement.
Assumption to check: No feedback during charging process
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
React Native Reanimated
expo-emoji-picker
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.
