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I am using an Iphone with the JEFIT app installed. The screenshots show how I set up the exercises and how I keep track of it. I am sure there are loads of free fitness apps out there that have the capability of tracking your progress and let you create your own exercises. The only crucial thing is that it needs to be able to export your data in .csv form. This file than can go into chat GPT and it will break down your workouts.