App Overview

Speedometer 55 Pro. GPS kit. icon

Speedometer 55 Pro. GPS kit.

Stanislav Dvoychenko · Navigation

A powerful GPS speedometer, mileage tracker, and trip-cost monitor with dash-cam and action-cam video

$3.99 · In-app purchases

PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
4.7
2,756 ratings · Top 15%

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 included17 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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Quick prompt

> SELECT BUILD PLATFORM:

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

// RORK SYSTEM PROMPT
Rork plan preview for Speedometer 55 Pro. GPS kit.: 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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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 lower power modes and GPS updates at intervals.

Assumption to check: App can drain battery quickly while using GPS.

Validate with people who use this workflow before building.

Hypothesis 2

Allow users to choose themes and display styles.

Assumption to check: Limited customization options for speedometer appearance.

Validate with people who use this workflow before building.

Hypothesis 3

Enhance GPS accuracy and provide calibration options.

Assumption to check: Inaccurate speed readings in certain areas.

Validate with people who use this workflow before building.

Hypothesis 4

Allow users to download maps for offline use.

Assumption to check: No offline functionality for maps.

Validate with people who use this workflow before building.

App evidence

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

App Store description

A powerful GPS speedometer, mileage tracker, and trip-cost monitor with dash-cam and action-cam video. See your speed at a glance, receive clear speed-limit alerts, record detailed routes, and understand the real cost of each trip. Features: ■ Speed Limits & Alerts Set speed limits with 4 or 8 one-tap presets. Large digits change from green to red and a sound alerts you when you exceed the selected limit. The app can remember where limits were used and reapply them automatically. ■ Cost, Fuel & EV Monitor See driving costs in real time for combustion and electric vehicles. For fuel, enter price and efficiency (US/UK MPG or L/100 km). For an EV, enter electricity price per kWh, usable battery capacity, full-charge driving range, and charging efficiency—the app accounts for charging losses. Add optional charges per mile or kilometer, split costs between passengers, and monitor estimated remaining range with configurable alerts. ■ GPS Tracking Record detailed mileage and routes, review speed, altitude, and statistics, or add a previous track back to the map to retrace it. Import and export GPX, KML, and KMZ files. ■ GPS Dash Cam & Action Cam Video Record the road or the action with synchronized speed, location, heading, and map data. Choose engaging overlays such as speed, map, Pitch & Roll, and G-Cross for live view, replay, or stamped exports. Keep a clean original, export a full video or selected range, and turn an exact replay frame into a georeferenced photo and waypoint. Loop recording can retain the latest part of a drive without filling storage with one endless recording. Because of iOS privacy restrictions, video can be recorded only while the camera recording screen is visible. Recording stops if you leave that screen or the app moves to the background. The app does not provide parking surveillance or automatic vehicle-power startup. ■ Mileage Calculator & PDF Reports Calculate distance, fuel costs, and mileage between addresses. Fill gaps in a mileage log, categorize trips, and create customizable professional reports for reimbursement or tax records. ■ Maps Choose Apple, Google, blank, or offline road, satellite, and topographic maps. Import MBTiles or SQLiteDB maps, download maps in the app, and create or share KMZ ground overlays. ■ Driving and Navigation Modes Use a full-screen speed display, mirrored HUD, rally computer, G-Force monitor, taximeter, map, water-sports mode, idle timer, paragliding instruments, or directional navigation for land, air, and marine use. ■ Waypoints & Camera Alerts Create waypoints with optional photos or audio notes. Receive approach alerts, apply speed limits, and import or export CSV, GPX, KML, and KMZ data. Import red-light and speed-camera data or use the built-in library. ■ Voice Coach & Siri Shortcuts Hear distance, duration, speed, and altitude at chosen intervals. Start or stop GPS tracking and set speed limits with Siri. ■ Barometric Instruments View real-time vertical speed and altitude with QFE/QNH support on compatible devices. ■ Background Mileage Tracking The speedometer and GPS track recorder can run in the background when enabled. Optional auto-recording logs driving without manual start or stop, ideal for tax or reimbursement mileage. It includes 50 free auto-tracks per month, with an upgrade available for unlimited use. ■ Speed & Distance Displays 0–999 in MPH, km/h, or knots, plus maximum and average speed, distance, altitude, and sunrise/sunset times. ■ Privacy & Compatibility Location data is used for speed monitoring and trip recording within the app and is not shared with third parties. Requires an iPhone or cellular iPad with GPS; Wi-Fi-only iPads and iPods need an external GPS source. Continued GPS use can reduce battery life. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

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Screenshots

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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.

SUGGESTED BUILD STACK
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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.