App Overview

Speedometer GPS: Speed Monitor icon

Speedometer GPS: Speed Monitor

Duyou Technology Co., Limited · Navigation

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

PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.4
453 ratings · Top 30%

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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A product spec, screen plans, and build steps for your coding agent.

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What's included18 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.

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.

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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> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
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.
            

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App evidence

Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.

Screenshots

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App Store description

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

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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 better GPS accuracy algorithms.

Assumption to check: Inaccurate speed tracking in certain locations

Validate with people who use this workflow before building.

Hypothesis 2

Provide filtering and sorting options for trips.

Assumption to check: Limited trip history management

Validate with people who use this workflow before building.

Hypothesis 3

Allow users to customize themes and layouts.

Assumption to check: Lack of customization options for UI

Validate with people who use this workflow before building.

Hypothesis 4

Offer an ad-free subscription option with premium features.

Assumption to check: Ads can be intrusive

Validate with people who use this workflow before building.

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.

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BUILD KIT DIFFICULTY
Intermediate

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.