U Biker: GPS Tracks

Track your rides, runs, walks and fitness privately. No account required. No ads.

👉 Precise.
👉 Reliable.
👉 Feature-rich.


📈 Science underneath

INNOVATIVE ALGORITHMS – machine learning and robust statistics algorithms are utilized for data processing.

NUMBER CRUNCHING – more than 75 statistics computed for every activity in sub-second resolution, raw data available in CSV format.

PHYSICAL CONSISTENCY – maximum speed cannot possibly be smaller than average speed, and metrics shouldn't spike without a cause.

MATHEMATICAL CONSISTENCY – problems of decimal rounding, finite precision, or round-off errors are all handled very carefully for top accuracy.


✅ Ideal for sports and adventures

With this app you can track all of your day-to-day activities, like walking and running, cycling, car driving, and even flying.


🛰️ GPS & Tracking

• No data collected, no account required
• GPS automatic sleep saves battery by turning off GPS when you stop
• Adaptive GPS interval saves battery by using GPS less often when you're going slow
• Speech
• Automatic pause
• Physical activity recognition
• Barometric altitude (use barometer sensor)
• Offline altitude (use elevation data from offline maps)
• Energy breakdown: Examine individual contributions (climb, drag, roll, etc.)
• Power from a power sensor, or accurately computed
• Functional threshold power (FTP) estimate
• AutoTerrain senses terrain roughness and adjusts power and energy consumption accordingly
• Advanced digital filters of our own design (IIR, FIR, non-linear) for superior accuracy and response
• Works accurately on extremely steep terrain
• Reduce location noise
• FenceGuard hides the location of your home or other important places from the recorded tracks
• Bluetooth and ANT+ wireless sensors
• Automatic sensor selection
• Compass
• Inclinometer
• Automatic wheel circumference
• Gear ratio
• Kinetic energy: Shows you the fall height equivalent to your current speed, so you can better perceive potential danger
• Braking energy: How much energy you lost by braking
• Brake pad wear
• Multiple vehicle and activity profiles
• Resume any past track
• Share to Strava, Google Fit
• Can be used without GPS, e.g. for indoor spinning


🗺️ Maps & Navigation

• Turn-by-turn directions to your destination, both visual and spoken
• More than 40 map types, including Google, Mapbox, HERE, MapTiler, Thunderforest, CycleOSM, and others
• Offline maps with terrain
• Weather radar map, animated
• Strava global heatmap with thousands of tracks from other users
• Guide routes
• Map auto-zoom depending on speed
• Quick zoom buttons


🎨 User interface

• Custom layouts
• Custom colors and fonts
• Light/Dark themes
• Screen stabilization by suppressing small movements
• Speech
• Media controls
• Live 10-minute charts
• Dim and app-lock the screen by waving your hand
• Pocket mode: Keeps the screen off while in your pocket
• Screensaver with adjustable timeout and dim strength
• Track color by parameter (altitude, speed, etc.)
• Screenshot: Share the current app screen
• Automatic or manual bell sounds
• Automatic or manual moving sounds (AVAS, Acoustic Vehicle Alerting System)
• Flashlight with automatic blinking
• Derived temperature sensor


ℹ️ Effort

The application is built from around 350'000 lines of original source code. That's about 10x more lines than the famous three-volume fantasy novel.

Recent changes:
v8.123
2026-09-17
📌 Improved GPS algorithm for reliability and accuracy
🗺️ Map interaction improvements
🧭 Navigation improvements and optimizations
⏯️ Tracking "Relaxed" auto-pause mode is now auto-adaptive
🌧️ Precipitation radar animation is now more reliable
🐞 Fixed: "Start" marker not visible on map while tracking
✅ Many other improvements and fixes