If you want a really quick answer, then yes, TapTap is safe for downloading mobile games. You will typically have no issues with the games you download. That said, like most things, it isn't completely cut and dry.
On Tuesday, Activision Blizzard announced that Call of Duty: Vanguard multiplayer and zombies will be free starting July 20 at 10 A.M. PDT // 1 P.M. EDT // 5:00 P.M.GMT until July 26, 2024.