Since the app is made for security-concerned people F-Droid is the right place to offer it in addition to Google Play.
Comments: Also, there is the option to add your own repository, which may not be the most accessible solution, but the Play Store is not needed for this to work.
Comments: Also, there is the option to add your own repository, which may not be the most accessible solution, but the Play Store is not needed for this to work.