I am 45 and completed a sprint triathlon last August with a time of 1:55. I will spare you the details but its obvious my prep for the race was not structured in a meaningful way.
As a result of my poor prep I looked for and found the 1st Time Tri app. I registered for a second sprint distance race and began the program 3 months out. I am very pleased with the results. I finished in 1:38, taking 17 minutes off my earlier time. I was able to complete each segment without stopping.
I think the app certainly delivered in terms of ensuring an individual can comfortably complete each discipline without issue.
My only criticism would be the ability to shuffle workouts around a bit easier but I believe this is being addressed.
I wish I had known of this app for my first race but am quite happy to have had it for the second race! Well worth the money.
Critter717 about First Time Triathlon, v1.9