Your iPhone can calculate GPS speed, but iOS does not include a system-wide current-speed display. The two reliable choices are a free browser speedometer or a dedicated app. Here is how they compare, plus why the speed limit in Apple Maps is not the same as your live speed.
1. Browser-based speedometer (free, no install)
You do not need to install an app to check your speed. Safari and other modern iOS browsers can request speed data through the Geolocation API. Open gpsspeedometer.io, tap to begin, and allow location access. The browser then displays your current speed in MPH or KPH.
This option is free, requires no account, and does not upload your location to our servers. It is ideal for a quick check or comparing your vehicle dashboard with GPS. Keep the browser in the foreground and prevent the screen from locking while using it.
2. Dedicated iPhone speedometer app
A dedicated app is better for regular use and features beyond a single number, such as trip records, route maps, average and maximum speed, HUD mode, and speed history. Our GPS Speedometer iOS app is free to download, has no ads or account requirement, and lets you see your live speed at no cost. Optional in-app purchases are available for premium features.
Does Apple Maps show your current speed?
Apple documents a Speed Limit option in Maps. It can show the posted limit for the road during driving directions, but that number is not your current GPS speed. Apple's current iPhone guide does not document a separate live speedometer or an always-on Speed toggle.
If you want the speed at which you are actually moving, use a browser speedometer or dedicated app instead of treating the Apple Maps speed-limit sign as a current-speed reading.
Does CarPlay include a speedometer?
Standard CarPlay does not provide a universal current-speed widget generated from the iPhone's GPS. Your vehicle may show speed in its own instrument cluster, and navigation apps may show the posted speed limit, but those are separate from a CarPlay live-speed feature.
For safety, position the phone before moving and avoid operating it while driving. A passenger can run a browser or app-based test when a live comparison is needed.
How accurate is iPhone GPS, really?
The iPhone uses GPS, GLONASS, Galileo and BeiDou simultaneously, which is the same multi-constellation receiver used in most modern Android phones and in dedicated handheld GPS units. Under open sky with a few seconds to settle, the speed reading is accurate to within 0.5 to 2 mph at highway speeds. That is more accurate than the car's factory speedometer, which is typically calibrated to read 2 to 5 mph high for legal reasons. We cover the physics in detail in how accurate is GPS speed in your phone.
Accuracy degrades in three situations: under thick tree cover, in tight urban canyons between tall buildings, and at very low speeds (below about 5 mph). In tunnels and parking structures with no sky view, GPS speed simply stops updating until you re-emerge. A speedometer may temporarily show zero or retain the last reading until it receives a reliable GPS update.
Which one should you use?
For a one-time check (verifying your car's dashboard, for example), the browser speedometer is the lowest-friction option. Open, tap, done.
For anything beyond the moment (tracking a road trip, logging a track day, measuring a 0-60 time, checking top speed at the end of a ski run), a dedicated app makes sense — that is what apps are for.
The takeaway
You do not need to install anything for a quick speed check: the browser tool is free and works directly in Safari. For regular use, the free core speedometer in a dedicated app adds a more focused experience, while optional premium features can add trip and history tools. Apple Maps and CarPlay should not be described as built-in current-speed displays.
To try the no-install option right now, open the live GPS speedometer on your phone. To verify your car dashboard against the GPS reading, use the car speed test walkthrough.