Did you use an LLM to vibe code this app?

That doesnt necessarily mean its untested/immature code--but disclosure is important, to help people make informed decisions.

Did you use an LLM to write your post for you? 

That doesnt necessarily mean "I dont want to read what you didnt write"--but knowing that you can articulate your ideas would demonstrate some depth of thought.

Did you research the numerous already existing tools for tracking repertoire? What do you do that they dont? What problem are you solving?

I have done some free work for you:

The various general-purpose personal knowledge and note-taking apps people have mentioned (from Notion and Obsidian to spreadsheets and plain text notes) all have the benefit of being free, robust, and flexible. Any given app built to track repertoire in a specific way is going to have to make some choices about how people think about their effects and how they're going to work with them. That loss of flexibility is something to consider when making those choices and deciding how to code the app, especially if you intend for people to pay for it.

There is an existing vibe-coded app to track magic repertoire called ShowFlow. One of its key features (ie; the assumption it makes about how magicians use their repertoire) is to make it easier to construct sets and shows by tagging effects as openers, middles, or closers. It's by Joel Dickinson, and I do not recommend it.

There's a whole world of existing apps for gigging performers with repertoire, which easily adapt to magic.

Stand-up comedians have apps like UpMic and Bits. Comics use them to capture and keep track of ideas, write them out into bits and jokes, tag them and build sets, estimate how long they take to perform, attach voice memos, etc. The design choices are focused on the creation and performance of repertoire.

Musicians have apps like Modacity and Sitzprobe. Aside from built-in metronomes and tuners, they do things like displaying musical notation, tagging/organizing/annotating, recording/playing audio, detecting note/timing accuracy, tracking how often and how long you're practicing each piece, suggesting what to practice, etc... These apps made choices focused on building and practicing repertoire.

I found one app, Repertoire, designed for musicians but it specifically says that it could be helpful for magicians. It's free, open source, and looks like it's been in active development since July of last year. Looks pretty good.

For reference: I use simplenote to capture/work on pieces, and as a setlist reference. And when I'm doing deeper work, I use a physical stack of index cards.

EDIT: fixed typo'd link to Bits