Independent software · London
Software.
Done properly.
Mulder Digital is a one-person software studio in London. Its flagship, London Bus Pal, has helped Londoners time their journeys since 2013. Its newest release, Numpal, is a number puzzle game built for quick, satisfying rounds. No VC, no pivots, no selling your data. Just quality apps, built with care.
London Bus Pal
Live departure times for Bus, Tube, Overground, Elizabeth line, DLR, tram and National Rail in one fast, private app. Open it and your next service is already there; no hunting, no typing, no waiting.
Numpal
A number path puzzle game. Swipe to connect numbers that add up to the target; easy to learn, genuinely hard to master. Quick rounds, multiple solutions per grid, works offline. Play through the ranked campaign with country leaderboards, or relax in sandbox freeplay.
London’s most intuitive transport app; and why it matters.
Instant, accurate, effortless.
London’s most intuitive transport times app. Whether you’re catching a bus, a Tube, a tram or a train, the information should be there the moment you open it. The fastest answer, the most accurate prediction, with the fewest taps possible. Not three screens deep. Not behind a search box.
London only. Deliberately. One city, done properly, is worth more than every city done adequately.
Help every London commuter time their journey perfectly.
If you got to stay dry because you knew exactly when to leave the house, good. If you spent a few more minutes with someone you love because you timed your train perfectly, even better. If you felt less anxious because you could see you’d arrive on time; that’s the whole point.
Timing matters. The app exists so that yours is a little better.
Thirteen years of knowing how to fly the plane.
Since the first line of code for London Bus Pal in 2013, every generation of tooling has been about building faster and better. GWT to write more with less. Flutter to ship once instead of twice. Now AI, to accelerate getting new features out. There is no shame in using AI if it’s done properly; the real question is whether you understand what it’s doing for you. Each new technology is worth learning properly, not just adopting.
AI is the autopilot. You get amazing results if you actually know how to fly the plane. If you have no idea how to fly and expect the autopilot to teach you, you’re in for a very hard time.
People associate AI with slop; low-effort work dressed up as innovation. That’s what happens when it replaces understanding instead of amplifying it. Thirteen years of building transport software is what makes the AI productive here, not the other way around.
The goal is to do more with less, and to a higher standard than would be possible alone. AI doesn’t replace the expertise; it lets thirteen years of it go further.
The non-negotiables.
Accountable to users, not investors.
No venture capital, no acquihire, no surprise pivots. The roadmap answers to the people who actually use the apps.
Your data is never sold. Full stop.
Location is used only when you ask for it. Nothing leaves the device to be traded. Not now, not ever.
Quietly improving since 2013.
Shipped, maintained, and here for the long run. Every app treated like it matters; because it does.
A real, registered London company.
Mulder Digital Ltd designs and develops its own mobile software and uses advertising only to promote its own apps. It doesn’t sell marketing or services to anyone else.