If you can only control a device by using voice, what is the Task you want your device to perform?

Hi, I Ken Choong. I currently developing a new project named SarahAssistant.

The process is like this:
You speak to your device -> Your device perform certain task

I actually developed a prototype for this app:
https://www.youtube.com/watch?v=Spa0Zt1Rrt0&t=9s

So my question is, what is the "Task" you want the device perform when you speak to your phone?

Some of the use case I developing is:

• Record your daily expenses
• Record your daily to do list
• Record your shopping list
• Record your audio and make it to a notes

My ultimate vision look like this video

Just like you see at StarTrek Discovery.

If you interested to look at this immediately when this is ready, sign up for beta at SarahAssistant.com

So add your use case, what you like to perform by just using your voice?