Projects
Apps and a Chrome extension
Rilo
Live on iOS and Android
A first phone for children aged about 4 to 10. Encrypted calls and messages, only with the people their parents approve. No strangers, photos, ads or analytics.
Brush Buddy
Live on iOS and Android
A brushing timer for young children. A cartoon tooth guides them through two minutes of brushing, one part of the mouth at a time. Fully offline.
Kiddypaint
On Google Play · iPhone version coming soon
Turns any photo into a colour-by-number page for children, entirely on the device. No account, no ads, no network.
Math Adventure
Live on iOS and Android
A calm, offline arithmetic game for children aged 6 to 9, called Rekenavontuur in Dutch. Number chains and number bonds, no ads, no account.
The best Chrome extension in the world
Live on the Chrome Web Store
A Chrome extension for Google Meet. It turns your background into the colour of your shirt and can play elevator music into the call while everyone waits for everyone else.
Web tools
Photoboot
Live on the web
A photo booth in the browser. Any laptop or tablet with a camera takes the photos, a cheap Bluetooth thermal printer turns them into black-and-white stickers, and guests can take a colour copy home on their phone.
SEPA QR
Live on the web
Fill in a name, an IBAN, an amount and a message, and get a QR code that any European banking app scans to prepare the transfer. Everything happens in your browser.
Pass the Aux
Live on the web
A DJ app in the browser for a small party. Two decks and a crossfader for whoever is on the aux, and a QR code so every guest can suggest the next track from their phone.
Open source
Smaller things I made and put on GitHub, free to use under their licence.
Google Calendar Sync
A Google Apps Script that keeps several Google calendars in sync across accounts, with a prefix on copied events and a choice of how much each side gets to see.
Rustpad
A hosted fork of Rustpad, Eric Zhang's minimal collaborative code editor. The fork adds document owners, locking and saved versions.
Original by Eric Zhang: ekzhang/rustpad
Small Victories Skillsbook
A WordPress plugin that keeps track of a group of people and their skills.
Small Victories Bookings
A WordPress plugin for a form with options that each have a limit: a simple booking or stock system.