Projects
Here's a comprehensive list of all the projects I've built over the years. Some are still running, others have been retired, but all were valuable learning experiences.
Keep the Score
Online scoreboard for any sport or game, ready in seconds. Stream it to OBS, show it on a TV or share it with a link. My main project, running since 2016: more than 2.8 million scoreboards created in 150+ countries, used by 5,000+ schools, and highly profitable!
Visit Site →Leaderboarded
Advanced online leaderboard maker for competitions, sales teams, classrooms and fundraising. Scores update live, boards embed on any website, and people can add themselves via a link or QR code. Branched off from Keep the Score in 2025.
Visit Site →Scorejudge
Real-time judging for live competitions such as hackathons, talent shows and karaoke contests. Each judge scores from a personal link with no login, and the audience watches the leaderboard update live. Branched off from Keep the Score in 2025; 3,000+ organisers so far.
Visit Site →Insult-o-Matic
Android app that speaks insults out loud. Type the name of a friend (or enemy), press Go, and your phone does the trash talk, then share the result anywhere. No ads and no swear words. Free on Google Play, with 500,000+ downloads to date.
Learn More →Android Wallpapers
A collection of hand-crafted texture wallpaper apps for Android: marble, wood, black, gold and more. Every image is pixel-perfect on any screen and gives your phone a new look in seconds. Rated 4.5 stars on Google Play, with 400,000+ downloads.
View Apps →Kittysplit
The simplest way to split group expenses after a trip or a night out. Everyone adds what they paid, and Kittysplit works out who owes whom. No registration and no password, in eight languages. Still running, but I sold my stake in the company.
Visit Site →DinkyDash
A family calendar for the wall, on a tablet, TV or monitor you already own. Paste a calendar link and it rebuilds itself every day, with rotating chores and birthday countdowns. Started in 2021 as a kids' dashboard; now a full web app, and still open source.
Visit Site →QRpage
A QR code with a real webpage behind it. Fill in a few fields and get a mini website plus a print-ready QR poster, for car sales, tour stops, weddings and more. Free, with no account and no app. Launched in 2026 — read the intro post.
Visit Site →Pathbox
Turns the phone an elderly parent already carries into a private GPS tracker. No $200 gadget, no monthly fee and no account: install it once, then see where they are from any browser. Being rebuilt, and launching soon on Android & iPhone.
Visit Site →Mailmouse
Easy sharing of email addresses. Currently just a landing page.
Visit Site →Wie oft?
CSS/JS tool inspired by XKCD (German). Static site on GitHub Pages.
Visit Site →Trixi
World's simplest task management tool. Minimalist project still running.
Visit Site →CostCam.app
Snap a photo of anything and AI tells you what it’s worth in seconds. Recently launched.
Visit Site →Deathwatch
Twitter bot that tracked dying tech startups by their tweets. Shut down: API costs too high.
Read the story →Progress Season Bot
Twitter bot tweeting seasonal progress. Shut down due to Twitter API changes.
View Archive →Free Tools
Free online tools from rise.global and zip1.io.
Random Team Generator
Free online tool to split any group into random, balanced teams instantly.
Try it free →Tournament Bracket Generator
Free online tool to create and manage single-elimination tournament brackets.
Try it free →Amazon Link Shortener
Free tool to turn a sprawling Amazon product URL into a short link with click stats.
Try it free →WhatsApp Link Generator
Free tool to build a wa.me chat link, with the first message pre-filled.
Try it free →