I have been playing for this for a month. I really like it because the developer has daily gift to you, the summons are actually nice because you could still buy the champion you want using mileage tickets.
I will definitely recommend you this game !! The free rare characters are also OP if you have their ex weapon.
IOS: https://apps.apple.com/ph/app/guardian-tales/id1485526957
Android: https://apps.apple.com/ph/app/guardian-tales/id1485526957