(Disclaimer: "vibe-coded" with bolt)<p>I have several breathing apps on my phone and watch and find each of them to be strong at one thing but weak at others (e.g. on has nice visuals but no way to customize the length of the exercises, another has good suggested patterns but a gimmicky UI, some don't have dark mode, etc.) so I decided to try to scratch my own itch.<p>Roadmap: maybe add sounds