Car Sat Nav Guide: Built-In vs Phone vs Portable

Summary

• Phone apps are free and often the best: Google Maps, Waze, and Apple Maps are free, always updated, and show live traffic.
• Built-in sat navs look the best: Factory-fitted systems integrate with the car's screen. But map updates can be expensive.
• Portable units are still useful: Great if your car doesn't have Apple CarPlay/Android Auto. No phone data needed.

Everyone needs navigation sometimes. Whether it's a built-in screen, your phone, or a dedicated unit, here's how they compare.

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Phone Navigation Apps

Google Maps

• Free to use on Android and iPhone
• Live traffic data and rerouting
• Speed camera alerts in some regions
• Works with Apple CarPlay and Android Auto

Waze

• Free community-driven navigation
• Real-time reports of accidents, police, and hazards from other drivers
• Excellent for avoiding traffic
• Uses more phone data than Google Maps

Apple Maps

• Pre-installed on iPhones
• Clean interface with good Siri integration
• Improved significantly in recent years
• Best for Apple CarPlay users

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Built-In Sat Nav Systems

• Pros: Integrated into the dashboard, no cables, clean look.
• Cons: Map updates can cost £50–£200. Some systems feel outdated compared to phone apps.
• Best systems: BMW iDrive, Mercedes MBUX, and Tesla's built-in navigation are among the best.

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Portable Sat Nav Units

Feature	TomTom Go	Garmin DriveSmart
Price	£130–£250	£120–£220
Map updates	Free lifetime	Free lifetime
Traffic data	Via phone Bluetooth	Via phone Bluetooth
Speed cameras	Yes (subscription)	Yes (free)
Screen size	5–7 inches	5.5–6.95 inches

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Which Is Best for You?

• Best for most people: Phone app (Google Maps or Waze) with Apple CarPlay or Android Auto.
• Best for older cars: Portable TomTom or Garmin if your car doesn't support CarPlay/Android Auto.
• Best for convenience: Built-in sat nav if your car has a good system with free map updates.
• Best for avoiding traffic: Waze — its community-driven alerts are unbeatable.

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Legal Considerations

Using a sat nav while driving is legal in the UK, but:

• Don't touch your phone while driving: It's illegal. Set your destination before you start, or use voice control.
• Mount your phone properly: Use a windscreen or dashboard mount. Don't balance it on the dashboard.
• Penalties: Using a handheld phone while driving means 6 penalty points and a £200 fine.

For the best experience, pair your phone with Apple CarPlay or Android Auto. You get the latest maps, live traffic, and voice control — all on your car's screen.

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Apple CarPlay and Android Auto

These systems mirror your phone's navigation apps on the car's screen:

• Apple CarPlay: Works with Google Maps, Waze, and Apple Maps. Needs a Lightning or USB-C cable (or wireless in newer cars).
• Android Auto: Works with Google Maps and Waze. Needs a USB cable (or wireless in newer cars).
• Benefits: Latest maps, real-time traffic, voice control, and a bigger screen than your phone.

If your car doesn't have CarPlay or Android Auto built in, aftermarket head units start from around £200.

Want to know more about in-car tech? Read our guide on dashboard warning lights so you know what every symbol means.

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