I can't say what will convert better, but what I can say is that the value proposition seems to be centered around personalization, but a demo workout list doesn't showcase personalization in any way, so it doesn't show me what the value of the app is. Every workout app obviously has a list of exercises.

My dream would be an app where I can share information about myself and my goals, as well as what equipment I have access to, and then get back a workout plan that I can easily tweak by adding or removing exercises, and the app adjusting the plan so that it remains balanced and in support of my goals. For example, say the app suggests deadlifts as part of a plan in order to strengthen the glutes, but I don't feel comfortable doing deadlifts, I could remove it from the plan and the app would instead suggest hip thrusts or something. That kind of functionality, or something in the same vein of personalization, isn't really demonstrated with a static demo. An alternative could be to only let me add or remove a certain number of exercises before I have to pay, or to only pull exercises from a limited set, or gate the whole personalization behind a paywall but let me see that it exists before I pay. Right now the value proposition is really unspecific.