The activity index can only be seen on the website www.fddb.info in the "My Fddb" section under "Personal settings": https://fddb.info/db/i18n/profile20/?lang=en
It is not displayed in the apps.
When a user fills out and creates his/her profile on Fddb, the activity index is displayed on the profile page. The activity index shows how intensively and how regularly the website and the food diary are used. The activity index can only be viewed by the user personally.
Some Fddb functions can only be used from a certain activity index. For example, own recipes / lists can only be published from an activity index of 25%. With regular use, the activity index automatically rises to 100% within a few days. If Fddb and the website www.fddb.info are not visited for a longer period of time, the value starts to decrease again.