I kept seeing people (myself included) let professional certifications quietly expire - AWS, Microsoft: Azure, CompTIA - and only notice during a job application or when scrolling my mailbox because of boredom. Renewing isn't hard; remembering is.
So I built Renuo - you add your certs, it color-codes what's valid / expiring / expired, and reminds you (push + email) at the lead times you pick. You can paste a Credly link or setup manually (Microsoft Learn link doesn't work 🥲) and it auto-fills the name, dates, and badge.
The interesting part for me: I'd never written a mobile app. Stack ended up being Expo (React Native) + Supabase (Postgres, row-level security, Edge Functions, cron for the email reminders), a landing page on Vercel, and GitHub Actions deploying it all. Coming from infra, the backend felt like home; the UI/UX was the real learning curve.
No analytics, no tracking, no ads - your cert data is yours.
It's finished and launching on iPhone very soon - just clearing the last App Store steps. If you want a ping when it goes live, the site's at:
Happy to answer anything about the build. What would you want a cert tracker to do?