Hey Product Hunt,

I built GPSSpeed because I kept not knowing how fast I was actually going.

Here's the thing that bugged me: in a lot of places a car's speedometer is allowed to read a bit high. So the number on your dash is not always the number on the road. And that's when the dial works at all — older cars with tired speed sensors, boats with no readout, bikes with tiny gauges. Meanwhile the phone in your pocket is already listening to GPS satellites.

GPSSpeed is the tool I wanted in that moment. Open it, tap Start, and you get one big, high-contrast number. That's the whole first screen — no calibration, no sign-up, nothing to scroll past.

What's in the app:

• Live, average and max speed, plus distance and trip time

• Four modes — driving, cycling, running, boating — with km/h, mph, knots and m/s

• Overspeed alerts (sound, haptic, notification) with your own threshold

• A mirrored HUD for the windshield on night drives

• Route maps, trip history, a Home Screen widget, and an Apple Watch companion

• 10 languages, including full right-to-left Arabic

The decision I care about most: there is no account, no cloud sync, no analytics SDK and no backend. Every trip lives on your device and nowhere else. An app that knows everywhere you've been should probably be the one that keeps it to itself. Delete the app and it's all gone.

Who it's for: drivers who want a second opinion, cyclists and runners who don't want a social network attached to their workout, boaters who need knots, and anyone driving abroad with unfamiliar units and unfamiliar speed cameras.

The core app is free. Pro is an optional auto-renewing subscription that adds unlimited trip history, CSV/GPX export and advanced HUD and widget themes — the current price is shown in the app.

One honest caveat: GPS accuracy depends on sky visibility. Tunnels and dense city canyons will degrade any GPS tool, and this is a companion instrument, not a certified or legal measurement device. Eyes on the road, let the app do the looking.

I'd genuinely love your feedback — especially on two things: does the big-number-first layout hold up in real driving, and which mode or unit defaults would you change? If something is missing or annoying, please tell me. I'm building this one in the open and I read every comment.

Thanks for taking a look.