First, create an area.
Add a name and one street and it will save automatically.
Once all the streets are added to the area return to the main screen and tap new run, you'll be asked to choose an area.

When adding numbers to the streets you only need to type the number followed by a space then start typing the street name and it will find the street for you. Pressing S or B for big or small will add the number to the top suggested street. Keep typing to get the street you want.

When adding numbers to the streets Follow this procedure:
(Number) (space) (number of items) (space) (street)
If no number of items is added it just adds one.

The number can be typed however you want i.e.: 1, 1a. 1/1. 1/1a.
If you want to add multiple of a number add a space after then how many you want
i.e.: 1 3 will be 1x3, 12 2 will be 12x2, 2/34 5 will be 2/34x5.

You can even type a description of the item. Whatever you type before the space will show up on the street.

Tap and hold to edit any number.
A single tap will darken the number to keep track of which ones have been done.