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
CurrentCost
Know exactly what you're paying for electricity — and why.
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 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 CurrentCost: 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
Provide simple tutorials and tooltips for better understanding.
Assumption to check: Users find it difficult to understand energy usage insights.
Validate with people who use this workflow before building.
Hypothesis 2
Simplify UI and prioritize key metrics.
Assumption to check: Interface can feel cluttered with too many data points.
Validate with people who use this workflow before building.
Hypothesis 3
Introduce customizable views and graphs.
Assumption to check: Limited customization options for displaying data.
Validate with people who use this workflow before building.
Hypothesis 4
Clarify the benefits of subscriptions and offer a free trial.
Assumption to check: In-app purchases can be confusing for users.
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
Know exactly what you're paying for electricity — and why. CurrentCost shows your local electricity rate, how it's changed over the past year, and what it's costing you to power your home right now. Live grid data — See real-time wholesale electricity prices from your ISO/RTO — ISO-NE, NYISO, MISO, SPP, CAISO, ERCOT, and PJM. Understand the difference between what utilities pay for power and what shows up on your bill. Energy resource mix — See exactly what's generating your electricity right now — natural gas, nuclear, wind, solar, hydro. Watch the mix shift hour by hour as solar peaks at noon and gas ramps up in the evening. Appliance cost calculator — Find out what it actually costs to run your air conditioner, electric dryer, or EV charger. Enter your wattage and hours — get daily, monthly, and annual cost estimates. EV charging optimizer — Compare the cost per mile of driving electric vs. gas. See time-of-use rate schedules for your region and find the cheapest, cleanest window to charge overnight. Data center explorer — Map data centers across the U.S. — both online and planned. See who operates each one and how much power it draws, and get a clearer picture of where major new electricity demand is taking shape. Rate trend — Track how your state's residential electricity rate has changed over the past 12 months and how it compares to the national average. CurrentCost covers all 50 states with EIA retail rate data, plus live grid data for major ISO/RTO regions — ISO-NE, NYISO, MISO, SPP, CAISO, ERCOT, and PJM. No subscription. No ads. One-time purchase.
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
React Native
Expo
Victory Native
React Navigation
React Native Async Storage
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.
