Frequently Asked Questions

How accurate is the GPS speedometer?

Velofy Speed uses your device's GPS to provide highly accurate speed measurements. The accuracy depends on your GPS signal strength and typically ranges from 1-3 km/h precision under good conditions. Our advanced algorithms filter GPS noise to provide the most reliable speed readings possible.

Can I use this while driving?

Yes, Velofy Speed works great for driving, cycling, running, or any activity where you need to monitor your speed. The large, clear display makes it easy to read at a glance. However, always prioritize road safety and follow local laws regarding device usage while driving.

Does it work offline?

Yes! Once loaded, Velofy Speed works completely offline as it only uses your device's GPS for speed calculation. No internet connection required. This makes it perfect for remote areas or when you want to conserve data usage.

What do the different colors mean?

The background color changes based on your speed: Blue (0-20 km/h) for low speeds, Teal (20-60 km/h) for moderate speeds, Yellow (60-120 km/h) for high speeds, and Red (120+ km/h) for very high speeds. This provides instant visual feedback of your current speed range.

Can I switch between km/h and mph?

Absolutely! Just tap the "km/h / mph" button to instantly switch between kilometers per hour and miles per hour. Your preference is automatically saved and will be remembered for future visits.

Is this speedometer free to use?

Yes, Velofy Speed is completely free to use with no hidden costs, subscriptions, or premium features. We believe accurate speed tracking should be accessible to everyone.

Does it work on all devices?

Velofy Speed works on any device with a modern web browser and GPS capability, including smartphones, tablets, and laptops. It's optimized for mobile devices but works great on desktop computers too.

How does it compare to car speedometers?

GPS speedometers like Velofy Speed are often more accurate than traditional car speedometers, which can show speeds 5-10% higher than actual speed due to tire wear and calibration. GPS provides true ground speed measurements.

About Velofy Speed

Velofy Speed is a modern, accurate GPS speedometer designed for anyone who needs reliable speed tracking. Whether you're cycling, driving, running, or engaged in any speed-related activity, our app provides real-time, precise measurements with professional-grade accuracy.

Why Choose Velofy Speed?

Unlike traditional speedometers that rely on wheel rotations or mechanical measurements, Velofy Speed uses GPS satellites to calculate your true ground speed. This results in more accurate readings, especially useful for activities where traditional speedometers aren't available or accurate.

Key Features

Real-time GPS tracking - Instant speed updates using your device's GPS with sub-second response times
Dual unit support - Switch between km/h and mph with one tap, perfect for international users
Color-coded display - Visual speed indicators for quick reference and safety awareness
Progressive Web App - Install on your device for app-like experience without app store downloads
Offline functionality - Works without internet connection once loaded
Mobile optimized - Perfect for smartphones and tablets with responsive design
Privacy focused - No data collection, no tracking, no registration required
Battery efficient - Optimized GPS usage to preserve device battery life

Perfect for

Cyclists - Track your ride speed, monitor training pace, and analyze performance
Drivers - Monitor vehicle speed, especially useful for rental cars or older vehicles
Runners and joggers - Measure pace and speed during workouts
Motorcyclists and scooter riders - Backup speedometer for safety
Boat and marine activities - Track speed on water where GPS is most reliable
Professional drivers - Truck drivers, delivery services, and fleet management
Sports enthusiasts - Track speed in various sports and recreational activities
Emergency services - Reliable speed measurement for first responders

Technical Specifications

Accuracy: ±1-3 km/h under optimal GPS conditions
Update frequency: Real-time updates every 100ms
GPS requirements: Minimum 4 satellite lock for accurate readings
Supported units: Kilometers per hour (km/h) and Miles per hour (mph)
Speed range: 0-999 km/h (0-620 mph) theoretical maximum
Browser support: Chrome, Firefox, Safari, Edge (latest versions)
Device compatibility: iOS, Android, Windows, macOS, Linux

Advanced Features & Benefits

GPS Technology Advantages

Velofy Speed leverages cutting-edge GPS technology to provide superior speed measurements compared to traditional methods:

Satellite-based accuracy - Uses multiple GPS satellites for triangulation and precise speed calculation
No calibration needed - Unlike mechanical speedometers, GPS doesn't require calibration or maintenance
True ground speed - Measures actual speed over ground, unaffected by tire pressure or wheel size
Weather independent - Works in all weather conditions (though GPS signal may vary)
Universal compatibility - Works with any vehicle or activity, from bicycles to aircraft

User Experience Features

Large, readable display - Optimized for quick glances and various lighting conditions
Smooth animations - 60fps transitions for professional feel and reduced eye strain
One-handed operation - All controls accessible with thumb while holding device
Auto-rotation support - Works in both portrait and landscape orientations
Voice-over support - Compatible with screen readers for accessibility
Keyboard navigation - Full functionality available via keyboard shortcuts

Performance Optimizations

Fast loading - Optimized code for quick startup times
Low memory usage - Efficient algorithms that don't consume excessive device resources
Smooth performance - Optimized for 60fps operation even on older devices
Background operation - Continues working when browser is in background
Cache optimization - Intelligent caching for faster subsequent loads

Safety & Privacy

No data collection - Your location and speed data never leaves your device
No registration required - Start using immediately without creating accounts
HTTPS secured - All communications encrypted for security
Open source - Transparent code that you can review and verify
No ads or tracking - Clean experience without privacy concerns

Safety Guidelines & Best Practices

Safe Usage While Driving

Mount your device securely - Use a proper phone mount to keep the device stable and visible
Set up before driving - Configure the app and position your device before starting your journey
Glance, don't stare - Use quick glances to check speed, don't focus on the screen while driving
Follow local laws - Some jurisdictions have restrictions on device usage while driving
Use voice announcements - Consider using accessibility features for audio feedback
Passenger assistance - Have a passenger monitor the speedometer when possible

GPS Accuracy Tips

Clear sky view - GPS works best with unobstructed view of the sky
Allow GPS warm-up - Wait for GPS to acquire satellite lock before relying on readings
Avoid tunnels and buildings - GPS signal may be weak or unavailable in covered areas
Check signal strength - Most devices show GPS signal strength in status bar
Calibration period - First few readings may be less accurate as GPS stabilizes
Weather considerations - Heavy cloud cover may slightly affect GPS accuracy

Battery Conservation

Reduce screen brightness - Lower brightness when ambient light permits
Close unnecessary apps - Free up system resources for better GPS performance
Use power saving mode - Enable device power saving when battery is low
Consider external power - Use car charger for longer trips
Monitor battery temperature - Avoid overheating in direct sunlight

Legal Considerations

Speed limits - Always observe posted speed limits regardless of GPS readings
Device mounting laws - Check local regulations for proper device mounting
Hands-free operation - Ensure you can operate the device without taking hands off controls
Emergency situations - Know how to quickly access emergency features if needed
Professional use - Commercial drivers should check company policies on device usage

Troubleshooting Common Issues

No GPS signal - Move to an area with better sky visibility
Inaccurate readings - Wait for GPS to stabilize, check for interference
App not loading - Check internet connection for initial load, clear browser cache
Slow updates - Close other apps using GPS, restart browser if needed
Battery drain - Reduce screen brightness, close background apps