Creating Tasks with Siri

2Do iOS v3.11.0 onwards supports the ability to create, edit and search tasks using Siri (provided you have enabled it in iPhone Settings > Siri & Search > Press Home for Siri OR Press Side Button for Siri)

Requires that you also enable Settings > Default Collection List > GTD Inbox in 2Do.

Usage

When instructing Siri, you need to always mention the app you'd like it to use, otherwise it will fallback to using the built-in Reminders or the Notes app.

Unfortunately, Siri doesn't understand "2Do" and is biased towards launching the Reminders app each time the moment it hears "to do". So, in order to make this work with Siri, 2Do should be referred to as "my daily app" or simply "daily".

It is recommended that you use the phrase "Using Daily" or "In my Daily App" either in the begining of the sentence, or the end. This way, Siri is able to disambiguate between several other apps that offer similar functionality.

For example:

" In mail Daily app , remind me to buy milk today at 7pm"

"Create a new list,  using  Daily app "

" With Daily app , show me all the tasks I created last week"

"Create a new task,  using my Daily app "

"Create a new note,  using my Daily app "

"Show me tasks I modified last month, using my Daily app"

Troublesooting 

After you enable Siri for 2Do for the first time, you may need to wait for several minutes before you're able to use it. 

If you find that Siri persistently keeps invoking these commands against the built-in Reminders app, try turning "Siri & Search" OFF for 2Do from under iPhone Settings and reboot your device.