Its basically universal that pre-loaded dumbbells come in five pound increments or multiples of five and pre-loaded barbells come in 10 pound increments or multiples of 10, even the available plates cannot create the odd weight calculations that the app suggests with a barbell either, such as 92.5 or 52.2 or any odd fractional weight with dumbbells or barbells if you use metric or imperial units (USA) its all the same and the app gives strange weight suggestions and there should be a way to change the unrealistic weight calculations. For iOS