The authors of the Chronogeoscope application for Google Play Store (Roberto Casati and Glen Lomax) really value digital privacy and as such, they do not keep any personnal information (identification or usage) about their users.
As you can check in the source code of the application at https://github.com/webplate/chronogeoscope_cordova the chronogeoscope on Android has no server side and thus provides no leak from your usage. Sharing your position locally with the application is necessary for its functionality but no information is sent online. As with any Google Play application, the Google company is tracking your interactions with the Google Play Store (installations, comments etc...) which is beyond our control.
This work is published under the licence: https://creativecommons.org/licenses/by-nc-sa/4.0/
More information at https://lambda.casa/chronogeoscope/