Apps
Things I designed, built and shipped on my own — for iPhone, iPad, Mac and Messages.
Paste messy JSON, get a structure you can read and the types to match. Tree, node graph, JSONPath, diff and six code generators.
It generates Swift Codable, TypeScript, Kotlin, Java, Go and JSON Schema. The JSON you paste never leaves your Mac.
A crossword that builds every grid on your device. Eight languages, three ways to solve, a Daily Puzzle — and no ads, coins or account.
The three modes are Clues, Word Bank and Codeword. You can also type your own word list and play it as a crossword.
A first recording studio for kids aged 5–8. Thirteen instruments synthesized in code, pads tuned so nothing can sound wrong, and real multi-track recording.
It never uses the microphone. Children record what they play on the pads and layer one track over another.
A colour-by-tile studio for children aged 4–6 who cannot read yet. Only the tiles that belong take the paint, so a mistake is impossible.
216 mosaics to colour, grouped into packs such as Animals, Dino World and Sky and Garden.
An iMessage sticker pack with the Poland ball: twelve stickers for everyday chat, from “Like a boss” to “Happy birthday”.
Static images only, so there are no accounts, no analytics and no network connections. Free, for iPhone and iPad.
A match-3 mine with no lives, no ads, and a third star that money cannot reach.
These are my own products — designed, built, tested and submitted solo. None of them collects personal data, shows advertising, or needs an account. Client and contract work lives on the Work page.
How I build my own apps
Every app listed here: no advertising SDKs, no analytics, no accounts, no servers.
This site: no cookies, no analytics, no third-party requests.
