How do you test your products?

I'm creating a fitness app that uses AI on @Lovable, and I'm also testing it myself.

I use the app daily to check its functions, how it works, and the exercises. If I find something strange or think of something new, I record voice memos with issues, changes, or improvements. I act as both the product manager and a user. Later, I listen to these notes and make the changes.

I'm interested in how you test your products. Do you use your own products? Do you have other testers? Or do you just hope for the best? 😁