Web apps
SaaS products, AI tools, dashboards, marketplaces, and custom platforms.
Mikołaj PiechFounder & developer.
I build mobile apps, web apps, and websites. I run Clevr Apps, where I develop my own apps, including Trailo, Subby, Doso, and Charmy Books.
Built, shipped, and used.
- projects delivered
- 10+
- downloads
- 30k+
- product sold
- 1
Selected work
Products I've designed, built, and shipped across web, iOS, and Android.
Charmy Books
Personalized books for children.
A personalized storybook platform that turns a child’s appearance, interests, family, and memories into a coherent illustrated story made specifically for them.
Solvee
SoldAI Homework Helper
Built, launched, and grew an AI homework app to 25K+ downloads before selling it. Students could photograph any problem and get a detailed, step-by-step explanation.
Trailo
Plan less. Travel more.
End-to-end AI travel planning: find flights, hotels, and tickets, then turn them into a personalized hour-by-hour itinerary.
Subby
Subscription Manager
I built Subby after losing money on forgotten free trials. It is a simple place to track subscriptions, see upcoming charges, and get warned before renewals.
One builder, end to end.
I work across product thinking, interface design, development, deployment, and the iterations that follow launch.
Mobile apps
Polished iOS and Android products, from the first screen to App Store and Google Play.
Websites
Product sites, landing pages, and company websites built to look sharp and convert.