About CdaCrr - Bike computer with ae
Bike computer to ride faster by improving your aerodynamic position and testing gear/equipment. Among other data, it monitors CdA (drag*area) and Crr (rolling resistance) coefficients, during races or dedicated testing...
Bike computer to ride faster by improving your aerodynamic position and testing gear/equipment. Among other data, it monitors CdA (drag*area) and Crr (rolling resistance) coefficients, during races or dedicated testing sessions. It
requires BLE or ANT+ power and speed sensors, and an anemometer (option, see below) for improved precision.
Powermeters successfully tested are:
- Power2Max
- Assioma pedals
- PowerTap hub (records speed so additional sensor is not needed)
Speed sensors currently supported are:
- CycleOps
- Garmin (Warning: old Ant+ Garmin model is not working with the app)
- Wahoo
- CooSpo
Avoid any magnet less speed sensor, their accuracy is not as good.
Read the help to quickly see how to use the app: http://cdacrr.blogspot.fr/p/help.html
If you need help, you may post on Slowtwitch forum, on this thread .
Current features:
-Compare Crr between different tires on ridden laps at slow speed (
-Configurable field to switch between different fields (altitude, cadence, bike direction,...)
-Model uses air density accuratly computed with weather station data and detected sensors
-One FIT file and several CSV files are stored and can be sent by mail for post analysis
-Hear/record voice message each lap
-Activate cloud storage to list/edit previous runs later
-Plot virtual vs real elevation (barometer needed)
-Measure road vibration with phone accelerometer if available
-Wind forecast on location where you plan to field test
-Enable/disable auto-zero feature of ANT+ powermeter
The app is free, but more features are available with the premium version :
Premium features:
It includes other modes (described here ):
-Defined lap length mode (for velodrome, click once to start the run)
-Time trial mode (needs barometer) to get CdA at the end of the race
-Criterium mode to get apparent CdA lap per lap during a race
-Training mode
And some optional devices:
-Support Weather Meter anemometer to record air speed (to get higher precision for CdA numbers during windy days)
-Possible to use Bluetooth headset to hear/record voice messages (useful during velodrome testing)
Download the key for the premium version here
Known bugs/possible issues:
-BLE connection with older phones is sometimes tricky
-Random ANT+ dropouts
...
Previous Versions
Here you can find the changelog of CdaCrr - Bike computer with ae since it was posted on our website on 2016-10-08 04:14:13.
The latest version is 4.0.1 and it was updated on 2026-06-27 06:42:28. See below the changes in each version.
CdaCrr - Bike computer with ae version 4.0.1
Updated At: 2022-03-04
Changes: See here: https://cdacrr.blogspot.com/p/release-notes.html
CdaCrr - Bike computer with ae version 3.1.0
Updated At: 2020-09-23
Changes: https://cdacrr.blogspot.com/p/release-notes.html
CdaCrr - Bike computer with ae version 3.0.5
Updated At: 2020-07-31
Changes: See here
CdaCrr - Bike computer with ae version 2.2.3
Updated At: 2018-01-21
Changes: (2018/01/21) 2.2.3:
-Fixes again
CdaCrr - Bike computer with ae version 1.4.5
Updated At: 2016-08-02
Changes: New in 1.4.5:,-(beta) Time trial mode: CdA between auto-start and a click at the finish line,-Fix crash for Android 6.0 when activating GPS,1.4.4:,-Wrong CdA when selecting "automatic segment mode" from main screen,1.4.3:,-Crash fixed after Powermeter detection,-Configurable fields (long click) indicated by a *,-Smooth/average option on power field,-Switching mode possible from main screen,-GPS may be activated in the settings,-iBike.csv file added to store more infos,-Road vibration measured
Disclaimer
Official Google Play Link
We do not host CdaCrr - Bike computer with ae on our servers. We did not scan it for viruses, adware, spyware or other type of malware. This app is hosted by Google and passed their terms and conditions to be listed there. We recommend caution when installing it.
The Google Play link for CdaCrr - Bike computer with ae is provided to you by apps112.com without any warranties, representations or guarantees of any kind, so access it at your own risk.
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