DARTS Scorer 2022 is the best and most easy to use darts scoreboard app.

The main features are:
â–ª Game modes: X01 (301/501) Cricket Shanghai
â–ª Local mode: Supports unlimited amount of players
â–ª Online mode: Play remotely with your friends and relatives
â–ª X01-Bots: Practice by playing against three differently skilled bots
â–ª 4 score input methods including a real dartboard
â–ª Smart checkout helper for beginners or pros
â–ª Voice recognition and speech output
â–ª Player management with profile pictures
â–ª Optimized X01 score view for connected screen via SmartView/Wireless Display
â–ª Statistics

ONLINE MODE (2022 Edition - cross-platform):

You can play X01-games online against your friends and relatives.
The amount of online players is unlimited and you don't need to set up accounts.
Just tap on "Online" create a game and share the join code.
Other players can join to your game using the join code.
It is also possible to rejoin the game using this code if you had connection issues.

The online-mode supports cross-platform multiplayer with Windows Android and iOS.