Work
Apps built for real people and used every day. You can look at each one, and open and try most of them.
Apps

Geoquiz
Learning app · PWA
A geography quiz with a spinning globe, 39 quiz types and all 195 countries. Works offline after the first visit.

Matma z Pedrem
Maths app for grades 1–4
Maths word problems where a child first picks the operation and only then works out the answer.

Crozzle
Crossword app · PWA
Crosswords built fresh every time: from a ready-made category, from your own topic, or as the crossword of the day.

Dzienniczek
Family app
A child's daily duties turned into coins, skill badges and rewards set by the parent.

Company event app
Event app · PWA
Agenda, venue map and directions on every attendee's phone for a one-day company event.

Bajkomat
AI automation
Pick a world, a hero and an adventure, and a few minutes later a bedtime story written from exactly that lands in your inbox.

Photo restoration
AI app
Upload an old family photo as a scan or a snapshot of the print, and get it back without scratches, sharper and in natural colours.

Electric
Learning game
Build circuits from batteries, bulbs, switches and bells, switch on the power and see if it works.
After hours
Games I built to learn new things.

Jeżyk 3D
3D browser game
A 3D adventure in tribute to Sonic Adventure: seven levels, bosses and a finale in space.

Fruity Frank remake
2D browser game
A modern take on Fruity Frank, the 1984 Amstrad CPC game I played as a kid.

Quiz Bohaterów
Quiz · PWA
A quiz about Nintendo and Sega characters: Mario, Donkey Kong, Zelda, Sonic and friends.
Pixel The Hamster
2D platform game In progress
Pixel the hamster climbs his cage to reach a banana, then races Ultron through a lava castle.
Got an idea for an app?
Describe it in a few sentences. I'll tell you whether and how it can be built, usually within two working days.