I know everytone wants saved searches etc...
I've had a mooch through the Forums...
My request pls would be just for a simple text Search function on the iPhone App, so I can quickly find a Task that I know is there but can't quite remember where!
Best if it searched both the Task title and it's details please
From the Help topic How do I search for a task or note on iOS?:
In our iPhone app, you can search for both tasks and notebook entries. The search bar is located above the top entry in any list. To reveal it, scroll to the top of your list and then keep scrolling by swiping your finger downwards