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
SIXT rent, share, ride & plus
Worldwide network with over 250,000 cars in over 105 countries with 2,000 stations
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.9
73,368 ratings · Top 5%
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/
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 SIXT rent, share, ride & plus: map the core Travel 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
Streamline the booking flow with fewer screens and clearer navigation.
Assumption to check: Complicated booking process with multiple steps
Validate with people who use this workflow before building.
Hypothesis 2
Implement a feature for users to request vehicles in specific regions.
Assumption to check: Limited car availability in certain regions
Validate with people who use this workflow before building.
Hypothesis 3
Enhance in-app messaging for quicker communication with support.
Assumption to check: Inconsistent customer support response times
Validate with people who use this workflow before building.
Hypothesis 4
Transparent pricing with a clear breakdown of all fees upfront.
Assumption to check: High service fees on rentals
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
Worldwide network with over 250,000 cars in over 105 countries with 2,000 stations With the SIXT car rental App you can rent cars in just a few seconds! Get access to all our car rental offers, find information about the nearest stations and how to get to them, select and reserve your desired car, and stay signed into your SIXT account to manage all reservations even faster. Key functionalities of the App: Before the booking: • Your Booking, Your decision Choose your favorite vehicle from our premium car rental fleet up to 30 minutes before the start of the rental period. Customize every reservation with the extras and protections that let you feel safe. • Distinctive fleet From high-end convertibles to premium SUVs. Discover and drive the largest selection of new, premium rental cars. After the booking: • Open the vehicle with the app Use our Online check-in: Save yourself the waiting time at the counter. Our app is your digital key to your rental car. • Get away faster The app doesn’t just tell you where the next station is. It also navigates you there quickly without detours. • Everything at a glance Keep track of your rental: all the details of your booking, which can be easily adjusted if necessary. Special Offers Access exclusive deals tailored just for you! • Exceptional service Enjoy easy pickups and returns, no hidden costs, and 24/7 customer support. • One login for all mobility Once you’re logged in, you can immediately find the vehicle you want, get all current prices and special offers, and book in seconds thanks to your predefined profile. You can also use all other SIXT mobility services: DIGITAL CAR RENTAL Skip the counter! Open your car directly with our App and enjoy the ride. CARSHARING WITH NO LIMITS (Germany and Netherlands) No limits for cars, duration and drop-off points - also at any SIXT station. WORLDWIDE RIDEHAILING Convenient ride hailing, taxi and limousine services wherever you need them. FLEXIBLE CAR SUBSCRIPTION The flexible car subscription service. All-round carefree package at a fixed monthly price. SIXT CHARGE Charging made easy. Charge any electric vehicle with the SIXT app. Do you have feedback, questions, or problems? You can contact us directly through the App. Our customer service agents are always there to help. Phone: +1 888 SIXT CAR (749 8227) E-Mail: [email protected]
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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
Supabase
React Navigation
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.
