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
ECOBICI
This is the new app for ECOBICI, Mexico City’s public bike system.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 3.8
173 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.
Build your own version
Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included19 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 ECOBICI: 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 real-time tracking and notifications for bike availability.
Assumption to check: Limited bike availability at peak times
Validate with people who use this workflow before building.
Hypothesis 2
Simplify the UI and improve user flow with clear icons and labels.
Assumption to check: User interface can be cluttered and hard to navigate
Validate with people who use this workflow before building.
Hypothesis 3
Enhance accuracy with better geolocation services and user feedback.
Assumption to check: Inaccurate station locations on the map
Validate with people who use this workflow before building.
Hypothesis 4
Provide detailed comparisons and benefits of subscription tiers in-app.
Assumption to check: Subscription options are not clearly explained
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
This is the new app for ECOBICI, Mexico City’s public bike system. ECOBICI’s evolution has begun. You can now access more than 9k bikes and 687 state-of-the-art stations. Just plan, unlock, and ride. With the ECOBICI app, you can: - Choose a plan, or switch plans - Find stations near you, and check their bike availability in real time - Easily unlock a bike at the port - Enjoy unlimited 45-minute rides - Get confirmation after successfully locking a bike - Review your ride history - Easily link your MI card ECOBICI connects with the Health app and sends ride durations so your pedaling counts towards your health goals. ECOBICI is ideal for short rides. It also lets you communicate with other means of transportation. You can find bike lanes on the map, and just go places easily. Enjoy your ride!
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
Axios
React Navigation
@react-native-community/geolocation
React Native Maps
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.
