App Overview

SpeedBox Performance Tracking icon

SpeedBox Performance Tracking

Dominik Reichert · Sports

Track your driving performance now!

$1.99 · In-app purchases

PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
3.0
22 ratings · Below Average

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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Build Kit

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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 SpeedBox Performance Tracking: map the core Sports 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

Include more advanced metrics like heart rate and calories burned.

Assumption to check: Limited performance tracking metrics

Validate with people who use this workflow before building.

Hypothesis 2

Add community sharing features for workouts.

Assumption to check: Lack of social features

Validate with people who use this workflow before building.

Hypothesis 3

Create a more streamlined and modern UI.

Assumption to check: Confusing user interface

Validate with people who use this workflow before building.

Hypothesis 4

Improve notification reliability for workout reminders.

Assumption to check: Inconsistent notifications

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

Track your driving performance now! ### automated launch timing + quarter mile timer for your sportscar ### This app is for GPS based tracking of realtime measured data. Perfect for drag racing, street racing and race track. Advantage: *safety: no use of stopwatches necessary while driving *comfortable: hands-off usage through automatic measurement *simple: just accelerate the car to start measurement *cheap: other hardware solutions costs hundreds of Dollars *You can do quick performance measurements and get performance data while driving. *You can choose between following preset modes: 0-60 mph, 1/4 mile, 1/8 mile, 1/2 mile, 0-35 mph, 60-120 mph, 100-200 mph, 80-120 km/h, 0-250 km/h, etc. *Measurement starts and ends automatically by chosen velocity mode. *You can do more than one measurement automatically after each other *Compare your times before and after improvements of your car and with your friends. *Altitude (uphill / downhill) *There will be a countdown sequence before start. *Ideal low budget solution for track days und club racing days. *GameCenter-Integration: ---> Transfer your results into leaderboards of Apple's GameCenter and compare to others ---> Defy friends ---> Send your results to friends via GameCenter (SMS, Email, etc.) *An external bluetooth GPS-receiver will improve accuracy. Special integration of XGPS160 with 10Hz: http://amzn.to/2b1LnK4 Trust all the other users all over the world, see App Store reviews and Instagram: https://www.instagram.com/speedboxapp/ ###### 1. GPS signal must be available. 2. Choose your mode in settings. 3. Start-button has to be switched. 4. Measurement starts automatically with acceleration ###### Please send questions and suggestions to [email protected] ###### This app should not be used on road, only on race tracks! Note: Continued use of GPS running in the background can dramatically decrease battery life

Written user reviews are not shown here. Check current App Store reviews >

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.

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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.