According to the system requirements available on the Play Store page, the software requires Android 2.3 and up in order to install it. However, in some cases, even if you have the latest version of the Android, the application might refuse to install because the developer needs to update some code to be compatible with the new features present in the Android 6.0.1. The same thing I experienced with an app that I frequently use and the developer updated that app for Android 6.0.1 and now it works properly.
You can also report this issue through the following email address: support@appliqato.com