Bicycle Power Meter

Bicycle Power Meter


1. The Bicycle Power Meter provides the most accurate power, energy, and % grade measurements in addition to typical cycle computer functions (elevation, speed, cadence (see below notes), mapping, logging, and charting with no external sensors, hardware or calibration required). The Bicycle Power Meter provides these features at a tiny fraction of the cost of conventional power meters and with no monthly subscription fee. The app is also compatible with the Zephyr Bluetooth HxM Heart Rate Monitor and (beta) ANT+TM compatible heart rate, speed and cadence sensors1. Try the app with no risk: we will provide support to help get the app to run to your satisfaction or a refund will be issued.

2. The best available smartphone resources (GPS, barometer pressure sensor, accelerometers, weather & elevation services, etc.) are used to achieve the best accuracy.

3. % braking energy can be viewed (user option) to give insight into how hard you brake into a turn.

4. Routes are plotted and graphed in the app, in real time with option for audio speech.

5. Route paths are color scaled in real time based on the users preference. One click changes the scale: power, speed, elevation, % grade, cadence or heart rate (with Bluetooth HRM) to map where on the ride significant events occurred.

6. A screenshot of the statistical data with the color coded map along with the raw data files (.csv .gpx and .tcx formats) can be easily emailed. .tcx format includes key parameters (speed, power, elevation, cadence, heart rate, etc.) to allow uploading to other analysis programs such as Garmin Connect, Training Peaks, Strava, Golden Cheetah, Google Earth, etc.

7. The accuracy of the power meter has been tested against state of the art, major brand named power meters.

8. Without calibration (only entering rider's weight and choosing bicycle type), average power for a given ride typically correlates to within 15% (with no drafting) of a conventional power meter.

9. Wind speed and direction effects are included! (with internet connection using local weather information, drafting effects not included).

10. Several default bicycle types are available to choose from, or bicycle weights and coefficients can be customized.

11. The app will run in the background.

12. English and Metric Units available. Set in user preference menu. English, German, Spanish, French language support.

13. Reload ride data to show progress and compare rides.

1For a list of ANT+ compatible sensors, visit www.thisisant.com/directory. Note that an ANT+ enabled mobile phone is required. See www.thisisant.com/consumer/ant-101/ant-in-phones/ for details.

See F.A.Q. at http://www.innovative-app-designs.com/ for more detail.

CADENCE TIPS:
***NOTE*** For some phones when the screen is turned off, the phone's accelerometers are disabled and the cadence data may be unavailable. This limitation has been documented in a number of other apps including pedometers. Using the screen lock feature can bypass this.
* For best results, prior to riding, under menu>preferences, select the phone's handlebar mounting orientation (portrait or landscape). If carrying in a jersey back pocket, set relative to the phone's orientation compared to looking forward at the handlebars.
* The cadence RPM and averages are tuned to power strokes detected from the phone's low power accelerometers while moving (i.e. not back-pedaling, downhill/coasting, etc.) and is more accurate as the power output increases above 1W/kg.
* The cadence sensitivity can be adjusted under menu>preferences. The default 'nominal' setting has so far produced the best sensitivity while minimizing spurious high readings.
* Noise may be observed in instantaneous readings depending on riding conditions (such as rough or off-road), riding styles, rider's power to weight ratio, and phone hardware.

Recent changes:
Ver 4.7.4: ANT+ ID lock option and minor bug fixes.
Ver 4.7.3: Zoom buttons added to #'s page.
Ver 4.7.2: ANT+ & Baro improvements.
Ver 4.7.1: ANT+ distance reset fix.
Ver 4.7.0: Added error checks for bad ANT+ data, improved pause function.
Ver 4.6.7-4.6.9: improved elevation startup / bug fix.
Ver 4.6.6: calorie correction with HRM, ANT+ improvements, weather service wind update frequency increased to every 4 minutes.
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$7.99
88
4.4
User ratings
69
Installs
1,000+
Concerns
1
File size
320 kb
Screenshots
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About Bicycle Power Meter
1. The Bicycle Power Meter provides the most accurate power, energy, and % grade measurements in addition to typical cycle computer functions (elevation, speed, cadence (see below notes), mapping, logging, and charting with no external sensors, hardware or calibration required). The Bicycle Power Meter provides these features at a tiny fraction of the cost of conventional power meters and with no monthly subscription fee. The app is also compatible with the Zephyr Bluetooth HxM Heart Rate Monitor and (beta) ANT+TM compatible heart rate, speed and cadence sensors1. Try the app with no risk: we will provide support to help get the app to run to your satisfaction or a refund will be issued.

2. The best available smartphone resources (GPS, barometer pressure sensor, accelerometers, weather & elevation services, etc.) are used to achieve the best accuracy.

3. % braking energy can be viewed (user option) to give insight into how hard you brake into a turn.

4. Routes are plotted and graphed in the app, in real time with option for audio speech.

5. Route paths are color scaled in real time based on the users preference. One click changes the scale: power, speed, elevation, % grade, cadence or heart rate (with Bluetooth HRM) to map where on the ride significant events occurred.

6. A screenshot of the statistical data with the color coded map along with the raw data files (.csv .gpx and .tcx formats) can be easily emailed. .tcx format includes key parameters (speed, power, elevation, cadence, heart rate, etc.) to allow uploading to other analysis programs such as Garmin Connect, Training Peaks, Strava, Golden Cheetah, Google Earth, etc.

7. The accuracy of the power meter has been tested against state of the art, major brand named power meters.

8. Without calibration (only entering rider's weight and choosing bicycle type), average power for a given ride typically correlates to within 15% (with no drafting) of a conventional power meter.

9. Wind speed and direction effects are included! (with internet connection using local weather information, drafting effects not included).

10. Several default bicycle types are available to choose from, or bicycle weights and coefficients can be customized.

11. The app will run in the background.

12. English and Metric Units available. Set in user preference menu. English, German, Spanish, French language support.

13. Reload ride data to show progress and compare rides.

1For a list of ANT+ compatible sensors, visit www.thisisant.com/directory. Note that an ANT+ enabled mobile phone is required. See www.thisisant.com/consumer/ant-101/ant-in-phones/ for details.

See F.A.Q. at http://www.innovative-app-designs.com/ for more detail.

CADENCE TIPS:
***NOTE*** For some phones when the screen is turned off, the phone's accelerometers are disabled and the cadence data may be unavailable. This limitation has been documented in a number of other apps including pedometers. Using the screen lock feature can bypass this.
* For best results, prior to riding, under menu>preferences, select the phone's handlebar mounting orientation (portrait or landscape). If carrying in a jersey back pocket, set relative to the phone's orientation compared to looking forward at the handlebars.
* The cadence RPM and averages are tuned to power strokes detected from the phone's low power accelerometers while moving (i.e. not back-pedaling, downhill/coasting, etc.) and is more accurate as the power output increases above 1W/kg.
* The cadence sensitivity can be adjusted under menu>preferences. The default 'nominal' setting has so far produced the best sensitivity while minimizing spurious high readings.
* Noise may be observed in instantaneous readings depending on riding conditions (such as rough or off-road), riding styles, rider's power to weight ratio, and phone hardware.

Recent changes:
Ver 4.7.4: ANT+ ID lock option and minor bug fixes.
Ver 4.7.3: Zoom buttons added to #'s page.
Ver 4.7.2: ANT+ & Baro improvements.
Ver 4.7.1: ANT+ distance reset fix.
Ver 4.7.0: Added error checks for bad ANT+ data, improved pause function.
Ver 4.6.7-4.6.9: improved elevation startup / bug fix.
Ver 4.6.6: calorie correction with HRM, ANT+ improvements, weather service wind update frequency increased to every 4 minutes.

Android Market Comments
A Google User
Apr 26, 2015
Idea is interesting, but needs additional devices to connect to improve accuracy Idea is interesting, but real measurements are not stable and not precise. it based on the metrics that phone could hardly evaluate precisely, needs additional devices to connect to improve accuracy .
A Google User
Apr 7, 2015
Does what it says I can finally analyse cadence and power after the ride. However, despite calibration I've done, I'm still not convinced about accuracy. If it's within 15% of the professional power meter e.g Garmin Vector then it's worth every penny or even more. It would be nice to see someone with conventional power meter to test it on different sections with different riding styles and compare results; but then a person using £1000 power meter would not bother doing testing. The Strava says that the device used for the uploaded activity was Garmin Edge 500, which suggest that data fields correspond to those from garmin device.
A Google User
Mar 29, 2015
Super! Very stable app. Customer support is prompt and very helpful. Look forward to having BTLE support in the app for HR and Cadence.
A Google User
Mar 26, 2015
Excellent but how for indoors? Great app for the cost. Wpuld be good if it works on indoor spin sessions though.
A Google User
Mar 13, 2015
Very fine app, Intervals would be a great addition My used PowerTap ($650 on Craigslist) hub failed after 4 years, then my Garmin 310 ($250) rubber side buttons wore out, so I have been riding for a few years without either power or GPS data. With this app, I now have a huge display (Samsung Note 3) with power and GPS for 1% of what I paid for the other gadgets (excluding the cost of the smartphone, which would be in my jersey pocket anyway). Please add marking of intervals to a future update, to support training with power data on particular climbs or time trial sections. Strava will do the intervals after the fact, but knowing your average power, heartrate and elapsed time during an interval is key. If you add intervals, my rating will go from 4 to 5 stars. BTW, Golden Cheetah is a great PC program to analyze the data after the ride.
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