WoW Retail Talents is the mobile app to check World of Warcraft: Shadowlands talents, PvP talents and covenant abilities for every class!
You can also create and save your own builds
It has a very neat design and is perfectly up-to-date because it is directly using Blizzard API.
All classes and specs.
Talents + PvP Talents + Covenant abilities
Full spell description.
Available in several languages.