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.
Transform every journey into valuable data with GPS Speedometer - the most comprehensive speed tracking app for driving, cycling, boating, and beyond
Free · 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 GPS Speedometer MPH Tracker: 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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Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Transform every journey into valuable data with GPS Speedometer - the most comprehensive speed tracking app for driving, cycling, boating, and beyond. Experience professional-grade features that keep you informed and in control. CORE FEATURES: - Real-time GPS speed tracking with precision accuracy - Comprehensive trip computer: speed, distance, altitude, heading, duration - Trip recording with route tracking - Live map view with real-time position tracking - Save and export your journeys ADVANCED CAPABILITIES: Picture in Picture Mode (PRO): - Keep your speed visible while using other apps - Resizable floating speedometer overlay - Perfect for navigation or music apps Heads-Up Display (HUD): - Project speed onto your windshield for safer driving - Mirrored display mode for reflection viewing - Keep eyes on the road while monitoring speed Road-Based Speed Limits (PRO): - Automatic speed limit detection for your current road - Real-time alerts when exceeding limits - Works worldwide with smart inference technology - Customizable warning offsets and sounds Speed Camera Alerts (PRO): - Warnings for fixed, red light, combined, and section control cameras - See cameras on the map as you drive - On-screen banner as you approach - Live average speed and progress bar inside section control zones - Pick voice announcements, alert sound, or both - Powered by the SCDB.info database - Coverage across Europe, UK, USA, Australia, and Brazil Performance Metrics: - G-Force meter tracks acceleration and braking forces - Enhanced altitude tracking with barometric sensors - Moving vs. stopped time analysis - Maximum and average speed calculations SEAMLESS INTEGRATION: - Apple Music display and playback controls - View current song without switching apps - Control your music while tracking your journey COMPLETE CUSTOMIZATION: - Choose units: KM/H, MPH, or Knots - Multiple display modes and layouts - Extensive theme selection with custom colors - Dark/Light mode support - Adjustable speedometer scale - Portrait/Landscape with orientation lock - Left or right-handed speedometer placement HANDS-FREE & LIVE ACTIVITY: - Start, stop, and control recording with Siri, Shortcuts, and Control Center (iOS 18) - See your live speed on the Lock Screen and Dynamic Island PRO SUBSCRIPTION UNLOCKS: - Unlimited trip saving and recording - Export routes in GPX format - Road-based speed limit detection & alerts - Speed camera alerts with voice and sound - Picture in Picture mode - Weather information with forecasts - Custom app icons - All themes and colors - Trip statistics with personal records and streaks SUBSCRIPTION INFORMATION: - Free to download with core features always free - Optional PRO subscription for advanced features - Cancel anytime via App Store settings - Payment charged to Apple ID at confirmation - Auto-renews unless canceled 24 hours before period ends - Manage subscriptions in your App Store account settings IMPORTANT NOTES: - Requires GPS/Location Services for speed tracking - Not compatible with Wi-Fi-only iPad models - GPS accuracy varies with signal strength and environment - Best accuracy in open areas with clear sky view - Continuous GPS use impacts battery life - Never interact with device while driving - safety first! Love the app? Rate us on the App Store! Your feedback helps us improve and add new features. Terms of Use: https://speedometer.app/terms
Written user reviews are not shown here. Check current App Store reviews >
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: Inaccurate speed tracking under poor GPS conditions
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited customization options for speed display
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of offline functionality
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Ads can disrupt user experience
Validate with people who use this workflow before building.
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.