I started building a focus timer app called Underlairs because I kept finding myself thinking, "There are a lot of beautiful, calm tracks, and lo-fi tunes for studying or working, but why isn't there a pomodoro timer with more immersive, cinematic sound?"
I did some early validation with a couple dozen potential users to see if this idea would even stick and discovered a warm signal, so I quickly launched an mvp to the iOS store.
I used Cursor, Sonnet 4.5, flutter & dart. I tried to design it with AI, but it didn't yield the result I wanted, so I just designed it myself in Figma and used Figma MCP to implement it.
"There's a lot of lo-fi music timers out there, but why isn't there a music timer with something more intense and immersive?"
Well, wait no more! Beast Mode allows unlimited music with no timer. You have access to five distinct playlists (lairs) to choose from. And lastly, there's a beautiful pomodoro timer with intense sound tracks.
