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.
Altitude Anytime Anywhere is a next-generation altitude measuring tool designed for people who demand accuracy, speed, and reliability—whether outdoors, traveling, training, or working in the field
$0.99 · 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 Altitude Anytime Anywhere: 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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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: Difficulty in getting accurate altitude data in real-time
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited offline functionality
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Poor user guidance on navigation
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Subscription management can be confusing
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.
Altitude Anytime Anywhere is a next-generation altitude measuring tool designed for people who demand accuracy, speed, and reliability—whether outdoors, traveling, training, or working in the field. Powered by the iPhone's advanced barometer and GPS subsystems, it delivers the most precise altitude estimates possible through intelligent data fusion, high-frequency updates, and optional user calibration. Built with a high-performance SwiftUI engine and CoreMotion/CoreLocation fusion logic, the app remains responsive, battery-light, and beautifully minimal. Most altitude apps rely solely on GPS or use slow, noisy barometric readings. Altitude Anytime Anywhere is engineered differently. It combines barometer, GPS vertical accuracy, and relative altitude baselines, automatically switching between: Absolute barometric altitude (when available on supported devices) Fused altitude (barometer + GPS baseline) for dynamic accuracy GPS-only mode when barometer data is unavailable This ensures dependable accuracy whether you are at sea level, in the mountains, or inside a building. 1. Absolute Barometric Altitude (when supported) Reads your device’s absolute barometer value to compute altitude with exceptional stability and low noise. 2. Smart Fusion Mode Automatically fuses GPS altitude, vertical accuracy, and relative barometer drift to deliver the most reliable real-time altitude possible in challenging environments. 3. High-Frequency Updates (up to 3 Hz) Smooth and responsive altitude readouts with real-time update frequency display. 4. Vertical Accuracy Display Shows actual measured accuracy in meters or feet, including warnings when precision is low. 5. Pressure Readings Displays atmospheric pressure in hPa when available. 6. Altitude History Chart Tracks up to 10 minutes of altitude history, including a calculated altitude delta for quick elevation change analysis. 7. Optional Manual Calibration Enter a known altitude to correct environmental pressure drift, improving long-term accuracy—invaluable for professionals. 8. Export CSV Data Export full timestamped altitude history for: Scientific use Sports analysis Drone operations Field logs Research documentation 9. Elegant Minimal Interface A clean design focused only on essential information: large altitude readout, clear indicators, and streamlined controls. 10. Metric & Imperial Units (m / ft) Instantly switch between meters and feet. Who This App Is For Hikers, trekkers, mountaineers Pilots (non-certified reference) Surveying & mapping professionals Outdoor athletes Paragliders & glider pilots Drone operators Meteorology & environmental science users Travelers curious about altitude in any location Anyone needing a fast, accurate height measurement What Makes It Unique Uses the newest absolute altitude APIs when available—something many altitude apps still do not support. Live fused altitude for real-time accuracy in environments where GPS or barometer alone fails. High-frequency 3 Hz sampling—far smoother than typical apps. Precision-centric design, with explicit accuracy status and data transparency. Zero clutter. No ads. No tracking. No unnecessary tools—just pure altitude measurement. Professional-grade CSV export, rare among competitors. This focus on accuracy, clarity, and professional use cases helps position the app as a premium, top-tier measurement tool.
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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.