Looking for the right combination of todo lists

[Kluesi]

Hi

I have an iPhone and an Amazon Echo. The most important thing for me is to have a todo list.

1. I want to add Items to this list with Alexa and with Siri.

2. I want to add items to this list with a reminder. E.g. Saturday at 11:00.

Both with Siri and with Alexa. I check many list apps like todoist etc. but no one satisfies my conditions.

Do you have any idea?

Thanks Jens