[Overview] Is your usual riding posture truly your fastest. This data field app analyzes aerodynamic drag in real time, visualizing your aero efficiency on screen. Test and optimize hood angles or drops on your regular routes without a wind tunnel. [A/B Test Mode] Compare the aerodynamic performance of two riding positions or equipment setups with a single press of the LAP button. Following a 10-second prep, the app measures for 90 seconds. Switch positions and repeat; the app directly shows how many watts B saves over A. Testing on the same day and course offsets environmental variables for dependable relative comparisons. [Garmin Connect Logging] Automatically logs estimated CdA and delta watts [DeltaW] into the FIT file. Review graphs and overall averages post-ride. Lap-by-lap CdA logging is also supported, letting you compare aero differences across laps or positions directly in the Garmin Connect lap summary. [Key Features] - Dynamic Aero Zones * With Power Meter - Analyzes posture in real time across 5 levels [SUPER AERO, Flagship, Aero Road, City Bike, Stopped], including duration held. * Without Power Meter - Shows aero drag percentage across 4 zones [CLIMB ROLL, MIXED ZONE, AERO ZONE, AERO CRITICAL]. - Real-Time Baseline Comparison [±W vs base] Displays delta watts against your configured baseline CdA in 1-watt increments. - Wind Compass and Yaw Angle Visualizes relative wind direction and displays real-time yaw angle to inform wheel and helmet choices. - Automatic Unit Sync Automatically adapts to your Garmin device settings for km/h and mph. [Operation Modes] - With Power Meter - Calculates steady-state CdA continuously from power, speed, and wind [cadence sensor not required]. - Without Power Meter - Estimates aero resistance percentage and total drag watts from speed and airspeed. [Conditions and Accuracy] Because values are physical estimates, relative comparisons [A/B testing or lap analysis] are recommended. To complete an A/B test, maintain over 50W, above 20 km/h [approx. 12 mph], and a steady pace for at least 45 seconds of the 90-second test. Use flat, uninterrupted roads. * Laps pressed during tests are also recorded as activity laps. [Recommended Setup] - Connect your phone and enable location and weather services [weather data can be disabled in settings]. - A power meter is recommended for maximum accuracy. [Trial and Purchase] Enjoy full access to all features free for 7 days. After the trial, scan the on-screen QR code for a one-time purchase. [From the Developer] If you find this app helpful, please leave a 5-star review on the store.

[Version 1.2.2] - Fixed a minor bug. [Version 1.2.1] - Fixed a minor bug. [Version 1.2.0] - You can now compare aerodynamic differences by lap or riding position after your ride in the Garmin Connect lap table. - Added real-time yaw angle display. - You can now set a baseline CdA (target or measured value) to monitor watt differences (±W) against it. - Revamped the display when riding without a power meter: now shows the percentage of aerodynamic drag relative to total resistance instead of a posture score. - Added a progress indicator during CdA measurement and warnings for mismatched conditions (gradient/direction) during A/B testing. - Added automatic miles/mph unit sync, a toggle for weather data usage, and Japanese localization for the settings menu. - Fixed startup memory errors, gradient update issues across consecutive rides, and minor screen label mismatches. [Version 1.1.2] - Fixed a minor bug. [Version 1.1.1] - Fixed a critical bug. [Version 1.1.0] Added A/B Testing Mode. Easily compare and verify the aerodynamic performance (watt difference) of two positions or setups by pressing the lap button. Added a timer display at the top of the screen showing how many seconds you have maintained the same aero class. Improved CdA estimation to work in environments without a cadence sensor (power meter only). [Version 1.0.6] - Fixed a critical bug. [Version 1.0.5] - Added data recording to Garmin Connect (FIT file integration). - Fixed a minor bug. [Version 1.0.4] - Extended the trial period to 7 days. [Version 1.0.3] - Adjusted supported devices. - Fixed multiple bugs. [Version 1.0.2] - Adjusted the calculation formula. - Added support for more device models. - Made the wind direction easier to understand. - Fixed a display bug. [Version 1.0.1 - Update] - Extended the trial period from 30 minutes to 240 minutes. You can take your time to test various riding conditions and positions. Reviews and star ratings are highly appreciated. [Version 1.0.0 - Official Release]