I came across intervals.icu a couple of years ago, via an article written about 2021 Olympic road race winner Anna Keisenhofer. In the article she noted the complex and adaptable graphics that intervals.icu delivers, based on data drawn in from a number of sources.

Part 3 of this series is somewhat delayed by Christmas and associated shenanigans such as the traditional Christmas Cold, which really flattened me for a couple of weeks.
In Part 1 I described the hardware I use for cycle training indoors. In Part 2 I’ll describe the principal software package I use for indoor training, TrainerRoad. Part 3 will cover the other software I use, and Part4 the software I use for monitoring my progress (with some hardware comments).
There's a wide variety of apps out there for use with smart trainers. For some of these I'll only give a brief description in Part 3, while others I'll keep my comments very brief as I haven't used them extensively enough to form a valuable opinion.
This is the first in a short series of posts in which I discuss my approach to training for cycle time trials. I find road cycling to be unsuitable for structured training sessions other than extended endurance sessions, due to a combination of climbs and descents (albeit pretty small around here), junctions, traffic lights and of course motor traffic. The exception to that would be the evening 10 mile time trials the club offers through the season, which provided an opportunity for riding at a high sustained pace for 20+ minutes.
In part 1, I’ll give a bit of background to the kit I use.