Question: to do list app ios mac?
Answer: Things (macOS, iPhone, iPad) Best blend of powerful features with elegant design. ... 
Todoist (macOS, iPhone, iPad, Watch, Android, Windows, Web) ... 
OmniFocus (macOS, iPhone, iPad) ... 
GoodTask (macOS, iPhone, iPad, Watch) ... 
2Do (Mac, iPhone, iPad, Android) ... 
TaskPaper (macOS) ... 
TickTick (Mac, iPhone, iPad, Watch, Android, Windows)