How to simplify the distribution of tasks between subordinates?

I would like to know if anyone knows how to simplify the distribution of tasks between subordinates? The thing is that I have a fairly large staff, over which I manage, but since there are a lot of them, and I am alone I am very difficult to daily allocate each of them separate tasks. And I would like to simplify this work at least a little bit.

Of course, when you are alone and there are a lot of subordinates, it is quite difficult to distribute tasks among all of them, and especially difficult to do it by text messages. In this regard, personally, as a manager of a rather large company, I have chosen a convenient task manager that allows me to distribute tasks to my subordinates by voice, which certainly simplifies my work http://voiset.info/.