Time the duration of bike wheelies using your phone's accelerometer and this app, which works as a wheelie meter duration timer. A leaderboard records the 10 longest wheelies. Wheelie detection can be customised. The device self-calibrates to take into account the orientation of the phone and its mounting angle.

You will need a handlebar mount that securely fixes your phone to the bike's handlebars.

It is recommended that you install the free demo version before purchasing this paid version. The demo version can be used to verify that the app functions correctly on your device before purchasing the full version. The code for both versions is the same, but the demo version is limited to 20 sessions of use and has a 5 second countdown timer at the start of each session.

The app needs no special permissions and contains no adverts. User settings and leaderboard data are stored locally on the device.

The user interface is available in English, French, German, Italian or Spanish.

Instructions
1. Install the app on your Android device.

2. Mount the device securely on your handlebars so it cannot fall off or move about. Handlebar mounts are widely available from online retailers.

3. Start the app. Check the display is the right way up. If not, set the screen rotation to automatic in your device's settings.

4. Press Start. You will be prompted for the rider's name. Make sure the bike is on level ground and not leaning to the side, an initial angle measurement is taken to account for the device's mounting position.

5. The main display turns yellow, indicating the app is ready to detect wheelies. When you start wheelieing the display turns green, or red if the duration of the wheelie exceeds the previous maximum. When you stop wheelieing the display returns to yellow (or blue if the last wheelie was the longest so far), and the app is ready to detect the next wheelie.

6. When you have finished doing wheelies press Stop.

7. A leaderboard of the ten longest wheelies can be viewed by pressing Scores (wheelie detection must be in the stopped state to access the leaderboard). The leaderboard can be cleared. Press Close to return to the main screen.

8. Settings can be changed to fine-tune how wheelies are detected, set a default rider name, enable or disable the prompt for a rider name whenever Start is pressed, and set how the longest wheelie is defined (from leaderboard, since the app was started or since Start was pressed). Setup can only be accessed when wheelie detection is in the stopped state. Settings can be reset to their defaults. The setup screen also shows the app version.

9. Exit the app using the device Back or App button.

Calculation Parameters
Minimum Angle sets the angle by which the front of the bike must be raised to count as a wheelie. With the Tilt Sensor off, if the front of the bike falls below this angle the wheelie is determined to have ended. If the tilt sensor is on, the wheelie is not detected to end until the front of the bike falls below this angle AND the sideways tilt of the bike is less than the entered Minimum Tilt Angle. This stops the end of the wheelie being detected if the rider swerves or steers with the front wheel in the air to help their balance. The Averaging Time is the time over which instantaneous angle measurements are averaged to provide more stable measurement values.

Disclaimer
It is the rider's responsibility to exercise due care and attention when using the app. Awareness of vehicles and pedestrians must always take precedence over operating or viewing the app. Do not mount the Android device where it impairs the operation of the bike's controls or manoeuvrability. Data provided by the app are approximate only and the app should not be used in situations where accuracy is critical for safety. Inaccuracies in the app or documentation and consequential loss or damage arising from any such inaccuracies or use of the app are the responsibility of the user.