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.
Off 2 is the flight tracker that keeps working when your wifi doesn't.
$3.99 · In-app purchases
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.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Off 2: Offline Flight Tracker: 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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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
Assumption to check: Limited offline functionality in flight tracking apps
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Poor user interface design
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Notifications for flight updates can be unreliable
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Inability to easily manage saved flights
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Off 2 is the flight tracker that keeps working when your wifi doesn't. While other apps lose signal the moment the cabin door closes, Off 2 uses your iPhone's GPS and barometer to track your flight in real time — at 35,000 feet, in airplane mode, over the ocean. No internet, no subscription, no excuses. — SCAN YOUR BOARDING PASS Tap your boarding pass barcode (QR, PDF417, Aztec, DataMatrix) and Off 2 fills everything in: airline, flight number, route, date, seat, booking reference. Boarding to wheels-up in seconds. — LIVE TRACKING, EVEN OFFLINE Watch your plane move on a stunning 3D globe — real position, real altitude, real ETA. The day-night terminator shows you exactly when you'll cross into sunrise. Flight progress that doesn't freeze. — SHARE YOUR FLIGHT Send a live link to family before takeoff. They watch your plane move across the globe in real time, see your ETA tick down, get notified on landing — even if you have no signal in the air. Peace of mind, no airline app needed. — APPLE WATCH COMPLICATION Time remaining, ETA, and progress right on your watch face. Updates autonomously, even when the iPhone app is closed. A glance is all it takes. — LIVE ACTIVITIES Your flight on the Lock Screen and Dynamic Island. No need to unlock or open the app. Just look down. — MULTI-SECTOR ITINERARIES Plan complex trips with multiple flights and stopovers. Edit times sector by sector — adjustments cascade forward automatically. Perfect for round-the-world routes, business travel, or any long-haul with a connection. — PEER CHAT AT 35,000 FEET Find other Off 2 passengers on your flight over Bluetooth and WiFi. No internet required. Share your seat, swap snacks, make a friend at altitude. — CURIOUS WHAT THE PILOTS SEE? UNLOCK PILOT MODE The cockpit view, in your seat. Barometric altimeter with QNH/QFE, Energy Path Angle (EPA) gauge, flight plan parsing, and proper flight level display at cruise altitude. The same numbers the flight crew is watching on the other side of the door — for the curious traveler and the AvGeek in all of us. (In-app purchase.) — AIRCRAFT DATABASE Browse 200+ aircraft by category (airlines and business jets), manufacturer, and model. Beautiful data for the curious passenger. — STUNNING 3D GLOBE Day-night visualization, your great circle route, tap to recenter on yourself. Optional: drop your own .mbtiles file into the Off 2 folder for custom maps. — PRIVACY FIRST No account. No tracking. No ads. Your flight data never leaves your phone unless you explicitly share it. — 39 LANGUAGES Fully translated for 39 App Store regions, including Arabic, Chinese (Simplified & Traditional), French, German, Hindi, Japanese, Korean, Portuguese, Russian, Spanish, Thai, and more. The flight tracker your last one wishes it was.
Written user reviews are not shown here. Check current App Store reviews >
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.