Season 4 was pretty easy to get through despite some repetitive 'use your app, kids!' scenes. The powers don't even do anything in the show besides initiating a generic 'armor glows and they're suddenly better at fighting' scene. Aaron (archer dude) actually gets some proper character development without having to rely on the plot, Clay has the obvious plot twists to his story as the 'main character'. Pity the rest pretty much stay the same, the villains still feel like they have more personality. The season has a proper ending, but they left a few 'to be continued' parts and I can imagine why fans would feel robbed after the next season never got to be (despite there being a wave of sets based on it).
AR apps are cursed.