You will find it hard to get free apps that are reliable. I install and develop Kodi and dedicated IPTV boxes, and always install a premium IPTV service, as free ususlly dies when the customer is watching a match… and then the phonecalls start!
Go to Get Ace TV and take a free trial. At weekends the trial is £2 / 24hrs.
You might also try Gears, Dreamstreams,IPguys or Flawless, but I rate Ace 10/10