#Fedilab is a paid app on Google and free on #Fdroid.
Google takes off 30% of the 2,5€, the idea was to encourage a small effort to use the free F-Droid app built from sources. Also, it helps to pay our server charges for translations and other services.

But, if you have no alternative to Google and don't want to pay. There is no reason to prevent you using Fedilab.
Just reach us, we can let you get the app for free with a code.
CC @Framasoft (related to a thread on Twitter)