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
Flight Tracker & Radar
Flight Tracker – follow planes routes around the world in real-time
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
1,726 ratings · Top 15%
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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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 Flight Tracker & Radar: 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
Implement reliable data sources for flight tracking.
Assumption to check: Limited real-time data accuracy
Validate with people who use this workflow before building.
Hypothesis 2
Simplify navigation and improve UI consistency.
Assumption to check: Overly complicated user interface
Validate with people who use this workflow before building.
Hypothesis 3
Add user preferences and flight alerts.
Assumption to check: Lack of personalized features
Validate with people who use this workflow before building.
Hypothesis 4
Optimize app performance for low-end devices.
Assumption to check: Inconsistent performance on older devices
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
Flight Tracker – follow planes routes around the world in real-time. Tap on the plane and see where it’s going and it's destination. No matter it's just your hobby or you'd like to follow your friends and family members – the app does it's job! Free features: - Limited number of planes around (free unlimited usage) - See Route (free unlimited usage) - Map Design (free unlimited usage) - Compass (free unlimited usage) Features with limited usage: - Add to “My Flights” (limited usage, unlimited available for premium users only) - Search Flights (limited usage, unlimited available for premium users only) - Planes Design (limited usage, unlimited available for premium users only) Premium features: - Unlimited number of flights and planes around (available for premium users only) - Measurement Units (available for premium users only) Are you ready to give it a go? Subscription information about pricing and terms: The app is based on freemium model: it's absolutely free to use. However, you can subscribe for unlimited access to all features with unlimited usage. We provide different options. The longer period – the profitable subscription. *Pricing in countries may vary and actual charges may be converted to your local currency depending on the country of residence. *Payment will be charged to iTunes Account at confirmation of purchase. *Subscription will be automatically renewed. Auto-renew can be turned off at least 24 hours before the end of the current period. *Your account will be charged for renewal within 24 hours prior to the end of the current period, and identify the cost of the renewal. *Subscriptions may be managed by you and auto-renewal may be turned off by going to the user's iTunes Account Settings. For more information please visit the link https://support.apple.com/en-us/HT202039 Read more about our terms and conditions here: Privacy Policy: https://applace.io/privacy/ Terms of Use: https://applace.io/terms/ Support: https://applace.io/support/ App website: https://applace.io We value your feedback more than anything. If you find that there is something about our app that doesn’t work for you and you have an exciting idea that could make it better, shoot us an email at [email protected]. We appreciate your feedback and strive to make the app better for you every day!
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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
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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.
