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
EV Companion
• Locations: Nearby restaurants, coffee, and other amenities
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.2
636 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 EV Companion: map the core Navigation 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
Implement offline maps download feature.
Assumption to check: Limited offline functionality for map access
Validate with people who use this workflow before building.
Hypothesis 2
Integrate real-time data updates.
Assumption to check: Inconsistent data on charging station availability
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to customize favorite stations and routes.
Assumption to check: Lack of user personalization options
Validate with people who use this workflow before building.
Hypothesis 4
Simplify user flows and provide clearer instructions.
Assumption to check: Confusing navigation flows
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
• Locations: Nearby restaurants, coffee, and other amenities. Personalized real-time availability, compatibility, and pricing & access information for 300+ networks based on YOUR specific EV • Trips: Groundbreaking AI finds charging stops along your route based on your preferences (including charging networks), weather, and traffic conditions • Vehicles: Select your EV to see charging compatibility and plan trips in seconds • Community: Leave & view feedback on any charging location • Tesla: Account integration to view your vehicle’s current ranges and charging status, and adjust max range and remote climate! Your vehicle’s current ranges are automatically input when trip planning. Plan those long-distance hauls much easier than in the Tesla itself! • Directions: via Apple Maps, Google Maps, Waze or Send to your Tesla Best of all: it's personalized for whichever EV or PHEV that YOU drive. Select your vehicle from our extensive list including: • Tesla - Roadster, Model S, Model 3, Model X, Model Y • Abarth - 500e • Aiways - U-Series • Audi - Q4, Q5, Q8, SQ8, e-Tron, GT • BMW - 330, 530, X5, i3, i4, i5, i7, iX, iX1, iX3 • BYD - ATTO 3, DOLPHIN, HAN, TANG • CUPRA - Born, Tavascan • Cadillac - Lyriq • Chevrolet - Bolt, Spark • Citroen - e-Berlingo, e-C4, e-Jumpy Combi, e-SpaceTourer • DS - 3 • Dacia - Spring Electric • Fiat - 500e, 600e • Fisker - Ocean • Ford - Escape, F-150 Lightning, Focus Electric, Mustang Mach-E • GMC - Hummer EV • Genesis - G80, GV60, GV70 • Honda - Clarity, e • Hyundai - IONIQ 5, IONIQ 6, IONIQ Electric, Kona Electric, Santa Fe, Tucson • Jaguar - I-PACE • Jeep - Grand Cherokee, Wrangler • Kia - EV6, EV9, Niro EV, Niro PHEV, Sorento PHEV, Soul EV, e-Soul • Lexus - NX, RZ, UX • LiveWire • Lotus - Eletre • Lucid Air - Dream Edition, Grand Touring, Pure, Touring • MG - MG4, MG5, Marvel, ZS • MINI - Cooper SE • Mazda - MX-30 • Mercedes-Benz - B 250e, EQA, EQB, EQC, EQE, EQS • Mitsubishi - Outlander, i-Miev • NIO - EL6, EL7, ET5, ET7 • Nissan - Ariya, Leaf, e-NV200 • ORA - Funky Cat • Opel - Astra, Combo-e, Corsa, Mokka-e, Vivaro-e, Zafira-e • Peugeot - e-2008, e-208, e-308, e-Expert Combi, e-Rifter, e-Traveller • Polestar - Polestar 2, Polestar 3, Polestar 4 • Porsche - Cayenne, Panamera, Taycan • Renault - Kangoo, Megane • Rivian - R1S, R1T • Škoda - Enyaq • Smart - #1, EQ • Subaru - Crosstrek, Solterra • Toyota - Prius, RAV4, bZ4X • VinFast - VF 8, VF 9 • Volkswagen - Buzz, Cross, ID.3, ID.4, ID.5, ID.7, Vizzion, e-Golf, e-Up! • Volvo - C40, EX30, EX90, S60, S90, V60, XC-40, XC60, XC90 • XPENG - G9, P7 • Zeekr - 001, X Don't see yours? We're always adding more, and our app works just as well without one. Let us know what you drive: https://evcompanion.com/vehicle-suggestion Our charger locations database is extensive worldwide, including specialized results from Tesla Superchargers, Tesla Destinations, Chargepoint, Blink, bp Pulse, Shell Recharge, 7Charge, e-On, Rivian Adventure Network, Circle K, SemaConnect, EVgo, Greenlots, OpConnect, EV Connect, GE Wattstation, FLO, Volta, Electrify America, Webasto, EvGateway, PowerFlex, ZEF Network, AmpUp, ChargeLab, eChargeNetwork, Sun Country Highway, and many more. Ditch the old EV app you’ve been holding onto and step into the new era of EV Companion, created for the rising age of electric vehicles.
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
react-navigation
@react-native-maps
axios
zustand
BUILD KIT DIFFICULTY
Advanced
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.
