GPS Speedometer for RVs & Motorhomes
Your RV is your home on the road. Get accurate ground speed across every state line, every mountain pass, every campground arrival — with a multi-day trip log that writes itself.
Why RVs Need GPS Speed
Multi-Day Reliability
RVs cover thousands of miles between rebuilds. GPS doesn't drift, doesn't need calibration, and doesn't depend on a 30-year-old wheel sensor. (Upsized tires throwing your stock speedo off? See the accuracy comparison.)
State-by-State Limits
Some US states cap RVs and trailer-towing rigs at lower speeds than passenger cars. Get the auto alert when the limit changes — no more wondering whether 65 still applies.
Aging Electronics
Older Class A and Class C rigs run on decade-old instrument clusters with sensors that drift. GPS bypasses all of it. If yours has gone fully dark, the broken-speedometer guide covers the full repair-vs-replace story.
Perfect for RV Life
Cross-Country Trips
- Accurate average speed for trip planning
- Distance + duration logged automatically
- Altitude for mountain-pass awareness
- Works in remote areas with no cell service
Campground-to-Campground
- Realistic ETA with average speed data
- Trip log per leg of the journey
- Heading + altitude on remote roads
Class A & Class C Motorhomes
- Wide-cockpit big-display readability
- Speed-limit auto-detection at highway speeds
- Trip log survives engine-off camping breaks
Class B Vans & Camper Conversions
- Same app whether you're in a Sprinter, ProMaster, or DIY rig
- Bike lane / urban speed-limit alerts on stealth-camp arrival
- Compact-mount friendly for smaller dashboards
Vintage Class A Restoration
- Replaces dead OEM clusters during restoration
- Avoids expensive vintage-RV instrument repairs
- Non-invasive — no wiring into 1970s harnesses
Boondocking / Off-Grid
- No cell service required for core tracking
- Altitude data for elevation-camping decisions
- Works in national parks where signal drops
RV-Friendly Features
Multi-Day Trip Log
Every leg logged — distance, duration, average speed, route — across full seasons. Export to GPX for travel-log records.
Big Display
Large numerals readable from across a wide RV cockpit. Glanceable while driving.
Offline Operation
No cell signal needed for core tracking. Perfect for remote camping and national-park drives.
Altitude Tracking
Real-time elevation, useful for mountain-pass awareness and high-altitude camping decisions.
Speed-Limit Alerts
Stay within RV-specific speed limits (often lower than passenger-car limits in some US states).
HUD Mode
Project speed onto the windshield — useful in older RVs with limited dashboard tech.
How to Set Up in Your RV
Download GPS Speedometer
Free download from the App Store.
Mount Your iPhone
Use a windshield, vent, or dashboard mount — RV cockpits have lots of real estate, pick what works.
Charge It
Long road trips drain GPS-active phones fast. Plug into the RV's 12V outlet or USB.
Drive
Allow 30-60 seconds for GPS lock when you start. Speed updates in real-time after that.
RV Speedometer FAQ
Yes. GPS Speedometer works in any RV regardless of age or model. It uses satellites, not the RV's electronics.
Almost always — especially if you've changed tire size, added load, or have an aging instrument cluster. GPS is consistently 1-2% accurate; factory speedos drift 5-10% with wear.
Core speed/distance/altitude tracking works fully offline once you have GPS satellite signal. Speed limit detection and weather features need internet.
GPS provides altitude in real time, plus you can see total elevation gained. Useful for monitoring engine load on long climbs.
Yes. Trip recording logs every leg. Export GPX files for record-keeping or insurance documentation.
Yes. GPS measures the speed of the iPhone (which is in your tow vehicle / RV). Independent of trailer weight, tire size, or load.
Continuous GPS uses ~10-20% per hour. RVs have plenty of 12V outlets — keep it plugged in for cross-country drives.
Yes, free to download. Essential features (speed, distance, basic recording) are free forever.
Related guides
GPS vs analog accuracy
Why GPS beats tire-size-dependent stock readings on RVs.
Tire-size speedometer calculator
Punch in old + new tire sizes to see your speedometer error in real numbers.
GPS speed tracker
Multi-day trip log + fleet history for long road trips.
Broken speedometer replacement
If your RV dash gauge has packed up.
HUD speedometer guide
HUD across the wide RV cockpit.
Speed-limit alerts
RV-specific limits, often lower than passenger cars.
Picture-in-Picture speedometer
Speed visible while you’re running maps and campground apps.
Speed camera alerts
Long-distance road trips? Get warned about upcoming speed cameras across 40+ countries.
Drive Your RV with Real Numbers
Free download. Multi-day trip log. Works on every road, every trip.
Cross-country, off-grid, or daily — accurate speed every time