I was going through my app subscriptions and realized I was paying $15 for a pretty good workout app, which seemed a bit high to me.

As a software engineer who is also well versed in claude code, I realized that I could likely vibecode a very similar app, or even build something more to my liking. I challenged my self to build something roughly equivalent this afternoon.

Workflow was: start with a detailed spec from Claude code describing many of the features common in workout apps. Then paste this into lovable to have it build out the initial mvp.

Once that was built, I used claude code extensively to modify the app until it was usable, including adding an import from the costly premium app.

While there are bugs, I think I might use this app. And it is insane that we are in a place where I can build this on my phone during an afternoon. In a few years, the economics of apps is going to be different, at least for folks willing to work a little bit.

In theory this project will save me over $190 a year.