App Overview

Traffic Blinker - Bicycle Tool icon

Traffic Blinker - Bicycle Tool

Stefan Van Damme · Navigation

When you turn onto a street, you want to warn other drivers

$1.99 · In-app purchases

PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
3.0
2 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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A product spec, screen plans, and build steps for your coding agent.

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What's included16 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 Traffic Blinker - Bicycle Tool: 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 haptic feedback and audio cues when lights are activated.

Assumption to check: Limited user feedback on light activation

Validate with people who use this workflow before building.

Hypothesis 2

Enhance map features with better overlays and user-friendly pin dropping.

Assumption to check: Poor map integration and usability

Validate with people who use this workflow before building.

Hypothesis 3

Clarify subscription benefits and provide a free trial to entice users.

Assumption to check: Subscription model may confuse users

Validate with people who use this workflow before building.

Hypothesis 4

Add offline map capabilities and basic navigation features.

Assumption to check: Lack of offline functionality

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

When you turn onto a street, you want to warn other drivers. This Apple Watch app displays a warning sign on your screen when you are about to turn left. The Traffic Blinker app helps you be more visible on the road! It is a great safety tool for bikers, cyclists, scooters, electric scooters, e-bikes, skateboarders, hoverboards, three-wheelers, or even one-wheelers. Bicycle Story: When I ride from home to work (or school) on my bike, I want to be seen on the route, especially in the dark, and I want other drivers to know what I am about to do. One of the most dangerous traffic moments is always turning into a street. This unique utility app helps you warn other drivers. Before the intersection, I extend my hand or arm, and the Apple Watch automatically activates the screen. It displays a blinking orange arrow to alert other drivers on the road. The Apple Watch is the ideal tool to stay visible, stay safe, and be seen. Today, there are more than 9 million bicycle routes and around 1 billion bicycles worldwide. That is a huge number. The Traffic Blinker app can help you be seen and stay safe, especially at night. It is designed and engineered as a simple concept—and it works. The Traffic Blinker app is a flashing safety light that makes you more noticeable. It is perfect if you are riding your bike after dark. When the screen is activated, the Retina LTPO OLED display at 1000 nits flashes the arrow pointer or your selected visualization on the screen. It also includes an option to hear and feel it when the screen activates. Gentle taps from the Taptic Engine let you know the screen is active, pulsing in rhythm with the blinking arrow. In addition, this is the ultimate fitness app for your Apple Watch. It tracks your health data, such as heart rate, active calories, time, and cycling distance, and syncs it with your Apple Health app. This useful and premium Apple Watch app works on both iOS and watchOS. So what are you waiting for? Get it now! How does this app work? 1. Open the Traffic Blinker app on your Apple Watch 2. Press the green button to start riding 3. When you want to switch from the right to the left lane, stretch your left arm out 4. The Apple Watch activates the screen and displays the warning sign to other drivers 5. Once you are in the left lane, return your hand to the handlebars 6. To stop the app, tap on the back button Recommended action: * For the best experience, you are required to enable the Always On feature must be enabled on your Apple Watch. That is available for Apple Watch Series 5 and higher. Apple Watch Features: ◆ Choose between Full Screen, Blinking Arrow, Moving Arrow, Stop Sign, or Animated Blocks (from right to left) ◆ Instantly track your workout in the Apple Health app as an outdoor cycling activity ◆ View real-time workout data, including current time, heart rate, distance, and calories ◆ Customize the blinker color and blinking speed ◆ Enable or disable sound and vibration for gentle taps during each blinking pulse Project information: https://www.stefanvd.net/project/traffic-blinker

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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
React Native
Expo
React Navigation
Zustand
Expo Location
React Native Maps
BUILD KIT DIFFICULTY
Advanced

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.