@metin I used the official app for a while because I was not really happy with Tusky, and I think it is solid. However, they both had one big problem: when I open the app, my timeline starts with the most recent posts and I have to scroll down to see the older ones, with no indication of what I've already seen. The only app on Android that lets you customize this is @apps (Fedilab), which also has lots of other cool features!
Edit: Added the name of Fedilab for better readability.