Polar Flow Exporter

A tool for exporting training sessions from Polar Flow.

Installation

$ git clone git@github.com:asib/polar-flow-export.git
$ cd polar-flow-export
$ python -m virtualenv env
$ . env/bin/activate
(env)$ pip install -r requirements.txt

You also need to download ChromeDriver if you don't have it already from https://chromedriver.chromium.org/downloads and put it somewhere in your PATH.

In Ubuntu, you can install with: sudo apt install chromium-chromedriver. Make sure that the version of ChromeDriver installed is a match for the version of Chromium you have installed, or Selenium will fail to start.

Usage

(env)$ python polar-export.py <username> <password> <month> <year> <output_dir>

The tool will save sessions into the output directory, using the default filename provided by Polar.

Explanation

Annoyingly, the Polar Accesslink API doesn't provide access to historical training data, only new sessions. This means that if you've just created, for example, a Strava account, you have to manually export and upload each session in order to have all your old data show on your Strava account. Even more annoyingly, all the existing Polar Flow export tools I found were clearly written prior to an extensive rewrite of the website, which now uses React under the hood. Therefore, they no longer work.

I originally wanted to use https://flow.polar.com/diary/training-list to fetch all the IDs, but they're cleverly hidden inside onClick attributes that have prebound arguments, so I got tired of trying this route (may revisit later - using React DevTools, it's possible to inspect them and find the ID under [[BoundArgs]], so perhaps possible to do programatically using Selenium).

Instead, the IDs are available on https://flow.polar.com/diary, but the page is only rendered properly with Javascript, so simply using requests wouldn't work, which is why I wrote this tool using Selenium.

Anyway, rant over.