Comment by haunter

Helper UI per se won't exist because there are so many little things.

If we talk about riichi then the best tutorial is probably in Kemono Mahjong https://cyberdog.ca/kemono-mahjong/

Personally I'd say Mahjong Soul is the best riichi client out there, that's where I play https://mahjongsoul.yo-star.com/ Extremely streamlined, good QoL features like tile highlighting (dora too), showing waits and options when you are tenpai, custom lobbies (so you can play with friends), and a pretty robust online ranked system. There is a good tutorial too. The big downside is the gacha system which is purely cosmetic and doesn't affect gameplay at all but it can be a turn off for some people.