SpamSieve & iphone

Hi I purchased SpamSieve and its working great on my mac mail, But on my iPhone 6 and apple watch spam still shows up. What i have to do is empty or open my mac computer first then the emails get cleaned on my iPhone and watch. This doesn’t work for me as i don’t have my computer with me all the time and if i open my iPhone i have to go threw all spam to each for my emails. What can i do and is there a online video to watch a step by step.
Thanks

SpamSieve runs on the Mac, so it cannot filter your mail if the Mac is off or not connected to the Internet. This is explained in more detail in the iPhone Spam Filtering section of the manual.