New here, in android, don't know what to download.

Hello all, completely new here with no experience using apps to read manga until now. My wife has an old version of Manga Zone that seemed pretty neat, but I see the available version of it currently is riddled with ads.

I mostly like reading older mangas, Gundam, Ginga densetsu, dbz, ect. Around that era. Is there a particular app you would recommend for older mangas like this or is there a catch-all app for just everything new and old? Thanks in advance.