Sleep Debt Co.

What I built Sleep Debt Co. is a sleep tracker that behaves like a creditor. Every morning it prints a thermal receipt: hours logged, hours owed, and a rolling 14-day balance stamped OVERDUE in red. Tap the balance and it hands you a payoff plan with a target bedtime for each of the next five nights and the exact date your account clears. Your sleep need isn't a setting you pick, it's calibrated over 28 logged nights, and the app tells you so on the setup screen. Six screens, clickable end to end: daily receipt, 14-day statement, payoff plan, manual entry, monthly statement, account setup. Why I wanted it to exist Every sleep app I've used gives me a score out of 100 and a purple donut chart. I have never once looked at a sleep score and changed my behavior, because a score is an opinion and it's easy to ignore. A bill is not. I wanted the version that treats lost sleep as something owed, with a balance that keeps growing until you pay it back the only way you can, which is by sleeping. How I built it I wrote the design system before writing a single prompt. A DESIGN.md with exact hex codes, rules for where each color is allowed to appear, and a prohibited list: no moons, no stars, no clouds, no purple, no gradients, no progress rings, no drop shadows, no glassmorphism. Every cliché the genre defaults to, banned up front. Then I let Flowstep generate against it. The useful failure came halfway through. I selected all four screens and gave per-screen instructions in one message, and it scrambled two of them into each other, turning my manual entry form into a duplicate of the daily receipt. The rule I got out of it: multi-select is for global changes only, anything screen-specific needs one screen selected at a time. I kept the broken screenshot. It's the most useful thing in the build. The best moment was the opposite. Navigation didn't exist until I added one consistent tab bar across all six screens in a single global edit. Flowstep wired the whole flow automatically after that, no manual linking needed. Built in one night, entirely on the free tier. Prototype: https://app.flowstep.ai/file?activeFileId=de6d6a56-3c72-4be8-ac23-f1b9e1436b52

On X: https://x.com/pevidex/status/2080553781528264991?s=20 On Linkedin: https://www.linkedin.com/posts/gabrielpevide_flowstepchallenge-share-7486319748285243393-6iJB/?utm_source=share&utm_medium=member_desktop&rcm=ACoAAAH35JwBKLF61YJNfWMHyo5pNq9t_Zi6bOM

Built "Duospin" — a fortune-wheel date randomizer for couples — from Figma to a live Figma Make prototype💕 Spin the wheel, get a date idea, scratch off a hidden bonus quest underneath (genuine drag gesture, not a fake reveal). Accept it, and it disappears from the wheel for the week. Go on the date, come back, add a photo and your impressions — it joins a stack of memory cards styled like polaroids.

Fully bilingual (EN/UKR), hand-localized down to every date idea and quest. Real photo upload, natural spin physics, swipeable cards with momentum, and product logic that actually holds up.

🔗 Try it live: https://duospin.figma.site/ (early prototype — memory album photos reset each session, everything else is fully interactive)

Loove it😍