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
Simlio - Travel eSIM & Data
Simlio delivers instant eSIM activation for travelers in 130+ countries – get reliable mobile data abroad without roaming charges or physical SIM cards
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
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/
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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 Simlio - Travel eSIM & Data: 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
Integrate multiple payment gateways to cater to a wider audience.
Assumption to check: Limited payment options for international users
Validate with people who use this workflow before building.
Hypothesis 2
Implement a comprehensive review system with user verification.
Assumption to check: Lack of detailed user reviews
Validate with people who use this workflow before building.
Hypothesis 3
Simplify the user flow with guided onboarding.
Assumption to check: Complex navigation for new users
Validate with people who use this workflow before building.
Hypothesis 4
Enhance support with live chat and comprehensive FAQ.
Assumption to check: Insufficient customer support options
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
Simlio delivers instant eSIM activation for travelers in 130+ countries – get reliable mobile data abroad without roaming charges or physical SIM cards. Our digital eSIM service provides affordable prepaid data plans with coverage across USA, Europe, Asia, and beyond. Perfect for international travel, business trips, and digital nomads who need seamless connectivity the moment they land. Instant eSIM Activation & Global Coverage Your travel eSIM activates in under 3 minutes with high-speed 4G/5G mobile data. Simlio's eSIM technology auto-connects when you arrive in popular destinations including France, Spain, Italy, Germany, UK, Japan, Thailand, Dubai, Turkey, Canada, Mexico, and Australia. No more hunting for airport SIM cards or paying for expensive hotel WiFi. Affordable Prepaid eSIM Data Plans Get budget-friendly prepaid eSIM data with flexible packages from 1GB to unlimited options. Our simple credit system lets you buy once and use your eSIM globally across multiple trips. Top up anytime through the app with no subscriptions or hidden fees – just straightforward travel data when you need it. Easy eSIM Installation Install your digital eSIM with one-tap Quick Install on iOS, QR code scanning, or manual setup guide. Share eSIM plans with family members and manage multiple eSIMs in one app. Works on all eSIM-compatible devices with real-time data usage tracking, detailed analytics, and smart management features. How It Works Browse destination countries, select your data plan and budget, purchase with in-app credits, install your eSIM with one tap, and arrive ready to connect automatically. 24/7 customer support via in-app chat with comprehensive FAQs and setup guides. No contracts. No physical SIM. No hassle. Terms: https://simlio.app/legal/terms Privacy: https://simlio.app/legal/privacy
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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.
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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.
