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.
Speedometer GPS: Speed Monitor is a high-precision GPS speedometer that integrates speed monitoring, trip recording, HUD head-up display, speeding reminder and other functions
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.
Kit ready. Verify your email to download it.
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.
JavaScript is required to complete mailbox verification.
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Speedometer GPS: Speed Monitor: map the core Navigation workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
Preview ready. Verify your email to reveal and copy the full prompt.
JavaScript is required to complete mailbox verification. Return to this prompt preview.
Affiliate link: CloneChart may earn a commission at no extra cost
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Speedometer GPS: Speed Monitor is a high-precision GPS speedometer that integrates speed monitoring, trip recording, HUD head-up display, speeding reminder and other functions. It provides real-time and accurate speed tracking and navigation assistance for drivers, cyclists, runners and outdoor explorers. Whether it is daily commuting, long-distance travel, or racing competition, this Speedometer app is your ideal choice! Core functions Accurate GPS speed measurement Relying on high-precision GPS technology, it displays the current speed, average speed, and maximum speed in real time to ensure accurate speed measurement. Supports kilometer/hour (km/h) and mile/hour (mph) two unit switching. Smart speeding alarm Set a personalized speed limit value. Once the speed is exceeded, the application will issue an alarm to remind you, effectively preventing speeding and helping you drive safely. And it supports 4 preset speed limits, which can be switched with a single click, allowing you to operate more safely while driving! HUD head-up display mode After enabling HUD mode, place the phone under the windshield to project the speed information onto the windshield, making night driving safer. Driving data record Automatically record detailed data such as travel time, driving distance, stay time, altitude, etc. Allowing you to easily view historical travel data or share it. Built-in map The built-in map can display the current location in real time and draw the driving trajectory to prevent getting lost. Picture-in-Picture Mode (PiP) Enable Picture-in-Picture (PiP) mode to view speed information in real time while using other applications. Suitable for scenarios such as navigation and music playback, so that speed measurement no longer affects other operations. The window size and position can be adjusted to ensure the best visual experience while driving. Altimeter & Altitude Measurement Built-in accurate altitude measurement function, real-time monitoring of current altitude, suitable for mountain driving, cycling and outdoor adventures. Speedometer helps you drive safely, accurately measure speed, and avoid speeding tickets! Download now to experience professional speed measurement service! Free features: The following core features are available without a subscription: Real-time speed measurement Remaining mileage statistics Set maximum speed limit Subscription features (premium features): Unlock the full feature experience and obtain access through subscription: Head-up display (HUD) mode Picture-in-picture (PIP) mode Map navigation integration Driving data recording and statistics Change speed dashboard style Automatic renewal terms Subscriptions will be charged to your iTunes account. Payment will be charged to the account immediately after confirmation of purchase. Subscriptions will automatically renew unless canceled at least 24 hours before the end of the current subscription period. The account will be charged for renewal within 24 hours prior to the end of the current period, and the renewal amount will be determined. Users can manage or cancel subscriptions in "Settings" > "Apple ID" > "Subscriptions". After the free trial (if any) ends, the system will automatically start the subscription according to the selected plan unless canceled in advance. Privacy Policy: https://sites.google.com/view/duyou-privacy-policy Terms: https://sites.google.com/view/duyou-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 in certain locations
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited trip history management
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of customization options for UI
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Ads can be intrusive
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.