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
Battery Widget: PowerToYou
With PowerToYou, you'll never have to worry about running out of battery again
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.8
191 ratings · Top 50%
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 included18 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 Battery Widget: PowerToYou: map the core Utilities 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 create fully customized widget layouts.
Assumption to check: Limited customization options for widgets
Validate with people who use this workflow before building.
Hypothesis 2
Implement push notifications for critical battery levels.
Assumption to check: Lack of notifications for battery status changes
Validate with people who use this workflow before building.
Hypothesis 3
Optimize the app for better performance on a wider range of devices.
Assumption to check: Inconsistent performance on older devices
Validate with people who use this workflow before building.
Hypothesis 4
Provide visual graphs or charts for battery usage history.
Assumption to check: Confusing history display without clear context
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
With PowerToYou, you'll never have to worry about running out of battery again. PowerToYou brings all of your device's battery levels together, so you can easily see how much battery life your devices have left, even if you don't have them with you. Plus, if a device is running low on battery, PowerToYou will send you a notification to remind you to charge it. PowerToYou comes with beautiful widgets that you can use to customize your home and lock screens. And with support for Bluetooth devices on macOS, PowerToYou has you covered no matter what kind of device you have. Don't let a dead battery ruin your day - get PowerToYou now and never run out of battery again. -- FEATURES -- Home Screen and Lock Screen Widgets on iOS Watch Face Complications on watchOS Menu Bar app on macOS Bluetooth Device Support on macOS Battery Level Notifications -- PRICING -- PowerToYou for Apple platforms is a universal purchase. Buy it once and it will be available on all your Apple devices. -- COMPATIBILITY -- PowerToYou requires iOS 14 and above, watchOS 7 and above, and macOS Big Sur and above. Due to system restrictions, adding Bluetooth devices is only supported on macOS. Please verify that your devices are compatible before purchasing it. NOTE: On iOS, PowerToYou refreshes in around 15 minute intervals if you add the widget. On macOS, PowerToYou refreshes in 15 minute intervals. On watchOS, PowerToYou refreshes in around 15 minute intervals if you add the complication to your active Watch face.
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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
axios
expo-linear-gradient
react-native-color-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.
