I am a huge, huge maffetone fan!!! 
We would love to add automatic HR workouts to our platform but have not done it yet. While I am a proponent of pure Maffetone for a base period are many variants of Maffetone that will be useful after this base period. I think this thread will provide some insights. Maffetone, Zone 2 and Polarized all have similar aspects of training.
https://forums.trainerday.com/t/gcn-dive-into-zone-2/
If you are following pure Maffetone, you really only need 1 workout and and our + - button and watch your heart rate. I am really happy to discuss anything you want related to this.
My personal experience with over-training in running, got me to Maffetone. I think you can learn a ton but doing pure base under your aerobic threshold. AeT (around 65-70% of HR usually) Even though Maffetone formula is based on age, and people think that is wrong. It was very accurate for me and most other people I have heard of. But strickly following maffetone and taking his MAF tests are ideal but a bit hard to do outdoors on a bike unless you have a perfect enviornment. Indoor, it’s optimium for MAF tests. I also suggest his pre-workout dietary suggestions and long warmups.