What is the best GPS speedometer app for iPhone?

GPS Speedometer MPH Tracker is the top-rated GPS speedometer app for iPhone with 5.9M+ downloads, 4.7★ rating from 121K ratings, and unique features like HUD display mode, Picture in Picture, and complete offline functionality.

Which speedometer app works without internet?

GPS Speedometer MPH Tracker's core features work without internet connection. Speed tracking, distance, and trip recording use only GPS signals. Some features like speed limits and weather require internet.

Is there a speedometer app with HUD display?

Yes, GPS Speedometer MPH Tracker features a HUD (Heads-Up Display) mode that projects your speed onto the windshield for safer driving, plus Picture in Picture mode and automatic speed limit detection.

Which speedometer app has Picture in Picture mode?

GPS Speedometer MPH Tracker is one of the very few speedometer apps with true Picture in Picture mode, allowing you to use other apps while keeping the speedometer and speed limit overlay visible.

Is there a speedometer with automatic speed limit alerts?

GPS Speedometer MPH Tracker features automatic road-based speed limit detection that alerts you when exceeding limits without requiring manual input or configuration.

What speedometer app has no ads?

GPS Speedometer MPH Tracker is completely ad-free in its current version, providing a clean, uninterrupted speedometer experience without advertisements.

Can I use a speedometer app for cycling?

GPS Speedometer MPH Tracker is perfect for cycling with features like average speed, distance tracking, elevation display, and trip recording. It supports KPH/MPH units for international use.

Can I use my phone as a replacement for a broken car speedometer?

GPS Speedometer MPH Tracker can provide accurate speed tracking for broken vehicle speedometers in cars, motorcycles, classic cars, and RVs. However, check local laws as some jurisdictions require functional built-in speedometers for road use. The app is best used as a temporary solution or supplement.

Does GPS Speedometer work for motorcycles?

Yes, GPS Speedometer MPH Tracker works great for motorcycles. Mount your iPhone on handlebars and use HUD mode or customizable displays. Perfect for bikes without speedometers or as a backup.

Can I use GPS Speedometer for boating?

Yes, GPS Speedometer MPH Tracker supports knots for marine use and provides accurate speed tracking on water. Features include trip recording, distance tracking, and route logging for boats.

How accurate is GPS speedometer compared to car speedometer?

GPS speedometers are often more accurate than car speedometers. Car speedometers can be off by 2-10% due to tire wear, while GPS Speedometer MPH Tracker provides satellite-based accuracy within 1-2% at speeds above 10 km/h.

What GPS speedometer app shows altitude and elevation?

GPS Speedometer MPH Tracker displays real-time altitude and elevation using your iPhone's barometer and GPS. Perfect for hiking, mountain biking, and tracking elevation changes during trips.

Is there a speedometer app that measures g-force for racing?

Yes, GPS Speedometer MPH Tracker includes a g-force meter that measures acceleration forces. Useful for racing, performance testing, and tracking acceleration from 0-60 mph.

Can I get a speedometer overlay on Google Maps or Waze?

Yes, GPS Speedometer MPH Tracker's Picture in Picture mode lets you keep a speedometer overlay visible while using Google Maps, Waze, Apple Maps, or any other navigation app.

Which speedometer app has customizable themes?

GPS Speedometer MPH Tracker offers multiple customizable themes and color schemes. Choose from various speedometer designs and colors to match your preference and visibility needs.

What's the best GPS speed app for long road trips?

GPS Speedometer MPH Tracker is ideal for road trips with features like trip recording, route history, GPX export, automatic speed limit alerts, and offline functionality for remote areas.

Does the app warn me about speed cameras?

Yes — GPS Speedometer MPH Tracker includes optional speed-camera alerts powered by SCDB.info, a professionally curated database covering 40+ countries. Alerts adapt to local law (France danger zones, Switzerland disabled by default, Germany passenger-mode disclaimer). The app does not surface mobile or crowdsourced cameras — only verified locations.

What's the difference between a speed camera alert app and a radar detector?

A radar detector is a hardware device that scans for police speed-measurement signals — those devices are banned in many countries. A speed-camera alert app like GPS Speedometer MPH Tracker is a different category: it reads your GPS position and matches it against a database of known fixed-camera locations. Apps are legal in most countries while detectors usually are not.

Boat GPS Speedometer with Knots Display

Track boat speed in knots with GPS. Perfect for boating, sailing, kayaking, jet skis, and all watercraft. Also works great for RVs and other large vehicles. Record trips, distance, and routes.

GPS Speedometer running on an iPhone clipped to the wheel pedestal of a sailing yacht at golden hour, alongside the analog binnacle compass

Perfect For All Watercraft

From sailing yachts to jet skis, the same app reads true GPS speed for every kind of watercraft you'll set foot on.

Sailing & Sailboats

Track speed through water in knots
Monitor sailing performance and VMG
Record distances on cruising trips
Backup for marine speedometer/knotmeter
Works when boat speed sensor fails

Powerboats & Motorboats

Accurate speed for boats without speedometers
Replace broken marine speedometers
Verify boat performance and top speed
Track fuel economy with distance data
Monitor plane-off speeds and cruising

Kayaking & Canoeing

Track paddling speed and distance
Monitor kayak touring trips
Record routes for future reference
Track training progress over time
Measure average paddling speeds

Water Sports & PWC

Jet ski and personal watercraft speed
Wakeboarding and water skiing tracking
Track kitesurfing and windsurfing speeds
Monitor SUP (stand-up paddleboard) distance
Record maximum speeds for bragging rights

Large Vessels & Yachts

Backup navigation instrument
Verify primary speedometer accuracy
Track cruising distances
Monitor passage times and speeds
Record boat delivery trips

Fishing & Trolling

Maintain precise trolling speeds
Track fishing spot distances
Record productive fishing routes
Monitor drift speeds
Document fishing trip distances

Why Boaters Choose GPS Speedometer

The reasons boaters reach for GPS Speedometer over a built-in marine speedometer or knotmeter.

Knots Display

Speed displayed in knots (nautical miles per hour) - the standard marine speed unit. Also supports MPH and KPH for inland boating. Switch units instantly.

1-2% GPS Accuracy

GPS provides 1-2% accuracy for true speed over ground. Read more about GPS tracking technology. More accurate than many marine speedometers which can be affected by fouling, calibration, or paddle wheel issues.

No Installation Costs

Marine speedometer installation costs $200-$800+. GPS Speedometer is free to download with no installation, no transducers, no through-hull fittings required.

Portable Between Boats

Use the same app on your sailboat, powerboat, kayak, or any watercraft. No need for separate instruments on each vessel. Just bring your iPhone.

Trip Recording & History

Record complete marine trips with route, distance, duration, and speeds. Save favorite routes. Review past voyages. Export GPX files for chart plotters.

Works in Open Water

GPS works anywhere with satellite visibility - coastal waters, open ocean, lakes, rivers. No cell service needed for basic speed and distance tracking.

GPS Speedometer's Picture-in-Picture window floating over a marine chart on a powerboat console at sea — Speed visible in Picture-in-Picture, layered over any nav app.

Marine-Specific Features

Built for the things that actually matter on the water.

Speed in Knots (Nautical Miles)

Display speed in knots - the standard marine speed unit. 1 knot = 1.15 MPH = 1.85 KPH. Easy switching between knots, MPH, and KPH for different waters.

Distance Tracking

Track nautical miles traveled. Monitor distances for passage planning, fuel consumption estimates, and trip documentation.

Average Speed & Time

Calculate average speed for accurate ETA predictions. Monitor trip duration. Essential for passage planning and fuel calculations.

Route History

Record and save boat routes. Review past trips and favorite anchorages. Export routes as GPX files compatible with marine chartplotters and navigation software.

Max Speed Recording

Track maximum boat speed achieved. Monitor boat performance. Compare speeds in different conditions or after bottom cleaning/prop changes.

Weather Information

View current weather conditions and forecasts at your location (when internet available). Helpful for planning on-water activities.

How to Use on Your Boat

Download GPS Speedometer

Free download from App Store. Grant location access for GPS tracking. Select knots as your speed unit in settings.

Mount iPhone on Boat

Use waterproof case and marine-grade phone mount. Position with clear sky view for best GPS reception. Secure against waves and boat movement.

Wait for GPS Signal

Allow 1-2 minutes for initial GPS satellite lock. Clear sky view improves accuracy. Works best in open areas without obstructions.

Start Your Trip

Speed displays in real-time as you move. Optional: Start trip recording to save route, distance, and statistics for documentation.

Marine Mounting & Usage Tips

Waterproof Protection Essential

Use waterproof phone case (Lifeproof, Otterbox, or similar). Protect from spray, rain, and splash. Consider dry bag or waterproof pouch for extreme conditions. Test waterproofing before taking on water.

Secure Mounting

Use marine-grade mounts designed for boats. RAM Mount, Scanstrut, or similar marine products. Secure against waves, boat movement, and wind. Test mount security before heading out.

Power for Long Trips

GPS uses battery. For extended trips, use marine USB charger or 12V adapter. Many boats have USB charging ports. Keep iPhone charged for all-day tracking.

Screen Visibility in Sun

Maximum brightness for visibility in bright sunlight. Anti-glare screen protectors help. Position mount to minimize direct sun glare. Consider shade or bimini protection.

Backup Navigation

GPS Speedometer is great for speed and distance, but not a replacement for proper marine navigation. Always have charts, compass, and primary navigation equipment. Use as supplementary instrument.

Sea kayak foredeck on a calm misty morning with GPS Speedometer in a clear waterproof case bungeed under the deck rigging

Frequently Asked Questions

Does GPS speedometer measure speed through water or over ground?

GPS measures speed over ground (SOG) - your actual speed relative to land/seabed. This differs from speed through water which boat speedometers measure. GPS is more useful for navigation and ETA calculations. Current affects both measurements differently.

Will GPS work in the middle of the ocean without cell service?

Yes! GPS receives signals directly from satellites, not cell towers. Core speed tracking, distance, and trip recording work anywhere with clear sky view - open ocean, coastal waters, lakes, rivers. Weather and some features require internet.

Can I use this to replace my boat's broken speedometer?

GPS Speedometer works great as a backup or replacement for broken marine speedometers. It provides accurate speed over ground in knots, MPH, or KPH. Many boaters use it to verify their boat speedometer accuracy or as primary speed instrument on smaller craft.

Is GPS accurate enough for precise trolling speeds?

GPS provides 1-2% accuracy which is excellent for trolling speed monitoring. However, remember it measures speed over ground, not through water. Current and wind affect your actual trolling speed. Use with knowledge of local conditions.

Can I save my favorite fishing or sailing routes?

Yes! Use trip recording to capture your route, distance, duration, and speeds. Save trips for future reference. Export GPX files to import into chartplotters or navigation software. Perfect for documenting productive fishing spots or favorite sailing routes.

How much does the boat speedometer app cost?

GPS Speedometer is free to download. Essential features (speed in knots, basic trip tracking) are free forever. Optional premium features (unlimited trip saving, advanced features) require subscription or one-time purchase.

Will saltwater damage my iPhone?

iPhones are water-resistant but not waterproof. Saltwater is especially corrosive. Always use a waterproof case (Lifeproof, Otterbox, etc.) when using on boats. Protect from spray and splash. Rinse case with fresh water after saltwater exposure.

Can I use this for kayaking and paddling?

Absolutely! Perfect for kayaking, canoeing, paddleboarding, and rowing. Track paddling speed in knots or MPH, monitor distance, record routes, and save trips. Many paddlers use it for training and documenting kayak touring adventures.

Ready to Track Boat Speed in Knots?

Download GPS Speedometer and start tracking your marine adventures today.

Perfect for sailing, powerboats, kayaking, jet skis, and all watercraft

Marine Navigation Disclaimer: GPS Speedometer is a supplementary instrument for speed and distance tracking. Not a replacement for proper marine navigation equipment, charts, or nautical instruments required for safe boating.