DarkSpeed: Bike Speedometer

One big number, full screen. Auto-start, plus live cadence and ultra-accurate BLE wheel speed. No account, no cloud — your data stays on your phone.

DarkSpeed is a GPS bike speedometer (and more) built for one thing: so you can read your speed at a glance from your handlebar mount. No maps, no account, no clutter. Hop on your bike and the app starts measuring on its own.

In short: one big number, full screen, OLED friendly and zero distractions!

SMART AUTO-START & AUTO-PAUSE

Forget pressing "start" with gloves on. DarkSpeed uses a two-layer motion filter (GPS + accelerometer) that eliminates false triggers:

• Auto-start once you pass the speed threshold • Auto-pause after 10 seconds of standing still • No accidental starts when a bus drives past

ACCURATE GPS SPEED MEASUREMENT

• A Kalman filter smooths the reading — speed won't jump around like on basic GPS apps • GPS + accelerometer fusion: two independent layers confirming motion • km/h offset calibration — match the reading to your car's speedometer • km/h or mph units

BLE SENSORS: CADENCE & WHEEL SPEED

• If you like, pair a Bluetooth speed & cadence sensor (CSC standard) • Speed measured from wheel revolutions — ultra-accurate and independent of GPS signal quality (forest, tunnel, dense city) • Live cadence straight from the crank • Adjustable wheel circumference

LIVE STATS & RIDE HISTORY

• Current, max and average speed, distance, ride time • Full ride history saved locally on your phone • Per-ride stats: distance, time, max and average speed, date • Persistent lock-screen notification: average · distance · time — without unlocking your phone

DESIGNED FOR OLED SCREENS

• Black background = real battery savings on OLED screens • Burn-in protection (subtle pixel shift) • Ride mode with screen dimming • Screen stays on while riding (wake lock)

PRIVACY WITHOUT COMPROMISE

• No account, no sign-up, no cloud • Your routes and stats never leave your device • We never sell your data

SPEAKS YOUR LANGUAGE

50 European languages — English included, of course. The app automatically matches your phone's language.

WHO IS IT FOR?

DarkSpeed is a bike computer in your phone — for anyone who just wants to see speed and distance: commutes, weekend rides, road and gravel training, amateur cycling. If you don't need maps or a social feed but want a clear GPS speedometer — this is the app for you.

Start free with GPS-based speed. And when you want measurements like a classic bike computer, add a BLE sensor (around ~10 EUR) and get turbo-accurate readings straight from the wheel.

Download DarkSpeed and turn your phone into a bike computer that just works.