Period Calendar → drip

Switching from Period Calendar (“My Calendar”) to drip, the open-source cycle tracker? This turns your .pc backup into a .csv file that drip can import.

Your file never leaves this device. The conversion runs in your browser; nothing is uploaded, stored or tracked. This page is even barred from making network requests.

Period Calendar doesn’t record intensity, so every day gets the same. You can edit days in drip later.

How to

  1. In Period Calendar, make a backup from the settings and save the .pc file.
  2. Choose that file above and download the CSV.
  3. In drip, go to Settings → Data → Import data and pick the CSV. Cycles and predictions are rebuilt from your history.

What comes along

Every period day, and your free-text notes. Symptoms, moods, temperatures and pills are left behind: Period Calendar stores them as internal codes, and guessing could put wrong entries into your history. If your period is ongoing, its upcoming days are left out because drip refuses entries in the future.

How private, exactly?

The page sends a content security policy of connect-src 'none', which makes the browser itself block any attempt to send data anywhere. Once loaded it also works offline. The code is small, dependency-free and open source; there’s a command line version too.