mobile

So I know as long as I use trusted sources and don't really side load any apps I should be pretty safe. I am also aware that many people don't believe that Antivirus does anything other than use resources. With that said I do wish to be secure and with my classes I am taking in college (cyber security) have become a bit paranoid. So I would like people's opinion on four available products

• Lookout
  1. Already pre-installed with T-Mobile
  
  
  2. Seems to do an ok job
  
  


• Bitdefender
  1. AV-TESTS ranked #1
  
  
  2. Works with my Moto360 watch
  
  


• Kaspersky
  1. I use this on my personal PC and has updates frequently
  
  
  2. Has a ton of features
  
  


• ESET (Nod32)
  1. Most Android features
  
  
  2. Supposedly very light on system resources
  
  

Given this list has anyone had experience with any on the list and would recommend one over the other?