Grumpy Old Geeks Products Peak Product Peak 4 mentions in 2 episodes A brain-training app one host says he enjoyed using but did not feel made him smarter. Mentions 97: Airgapping Our Grievances Feb 21, 2015 1:00:13 I was using Peak, the brain training app 1:00:50 It was a fun experiment. I did not feel smarter. 94: Shiny Happy Puppies Holding Hands Jan 30, 2015 43:12 I'm doing a peak right now. It's another brain training app 44:25 you tell them what kind of training you want and you can modify that as you go