To go to the kitchen scale or jar tap either or depending on which function you are using (jar or scale).
Hold your phone next to your selected container and fill it up until the red marker (the volume or weight you selected).
If your container is to small for your required amount, the red marker will add a factor you need to refill the container:
In the example above you need 20 oz of flour. Your container can handle a maximum of close to 15 oz. So the app sets the marker at 10 oz, and tells you to fill the container twice, which results in 20 oz.
The app can handle up to 100x in some containers, but it might be better practise to use a bigger container when asked to repeat for let’s say 50 times.