Unfollowing APPs on Android Store – Are they safe?

Hello,
So I was wondering if unfollowing apps are safe because in a strange coincidence I've got hacked by some russian boi after I started using most popular one which is named "Unfollowers for Instagram". Afterall I scanned my pc using eset, adwcleaner and also my android phone using avast and every report said it was clear of viruses. Maybe my password wasn't very strong but I think it wouldn't be possible to make brute force attack and guess it in 1 day (ye cuz account also had one day…

Unfollowing APPs on Android Store – Are they safe?