Due to Google Analytics is sunsetting i have to migrate my analytics from GA to Firebase, but I found difference between the two data calculated between the two platforms.
For Example my mobile app "Active users" based on Google Analytics
1 day: 135
7 day: 653
28 day: 2,224
but my "Active users" based on Firebase is
1 day: 1.6 k
7 day: 6.6 k
28 day: 17 k
is there a difference in the algorithm or how the two platforms differentiate or identify their active users?