All the apps I made outside of work in the last month
All made with the amazing AI tools you’re well aware of now, all running on my home server (a mac mini), accessible through tailscale (works well, I recommend this setup), with a custom domain for each through cloudflare (I told AI about its API and it then just did magic for me).
Below on the apps that are still running. I made 3-4x more that are simply not live anymore or not used anymore.
Central app monitoring: An app that tracks that status of all other apps. My deploy SKILL.md automatically adds new apps to this one.
Running streak overview: My wife runs every. single. day. This app takes data from Strava and plots it in fun ways over time, including upcoming races and whatnot.
Rekensterren: A fun mobile app for my kids to learn to do math, and earn Pokemon cards when they reach certain achievements
Leessterren: The same but for reading for my five year old
HIIT Record: An app to show our trainer which HIIT workout was the best/worst based on Strava data (heart rate mostly)
Vestaboard: I have a Vestboard (google it, it’s an amazing thing). This app controls it and shows me things I’m interested in, and works well with the rest of my apps, e.g. showing when things are down.
MQTT-tracker: My home automation runs on MQTT, this app allows me to see all MQTT messages come by and plots them over time. It also has a function that finds correlenation between particular signals. Very fancy.
Heat pump programmer: Long story short: the thing that controls my heatpump doesn’t work well. I made my own controller that takes as input temperature and valve openings of the floor heating and controls the heatpump based on that. It’s elaborate and works quite well - much better than the software that the supplier came up with.
Ice cream app: I got a Ninja Creami, and this app suggests recipes and stores my favorites!
Piano sight reading: My daughter and I are learning to play piano. To improve our ability to know which note is which key, I made an app! Has achievements, built-in spaced repetition and a nice onscreen keyboard. In theory it can connect with MIDI to our keyboard, but I learned the hard way that Safari on iOS does not support webMIDI.
Guitar tabs: An app to keep track of guitar tabs I like. I can import any and make them easy to read and print.
For work, I made a million others. That another day. What’s your best creation so far?


Sports/health/finance are my first topics to work with. It’s fun :)
Heatpumps and running! Pretty much my favourite subjects (as well as good product design). I'd love to know more about the heatpump programmer. The MyVaillant app I have is super basic and in no way helps me optimise the system or understand its performance.