zzd Labs
zzd builds websites for Swiss businesses by day. These are the products it builds for itself, developed in the open — code going public, real numbers (revenue vs. break-even), mistakes included.
Products
Selfvie
Turn a stack of selfies into one smooth video, with your face steady in the middle of every frame.
Free on the web, source public
DualShot
Front and back camera, one video. An Open Camera fork for phones whose hardware can do more than their spec sheet admits.
Working on one device
Chatter
An attempt at a language app you practise by talking to. Stopped in September 2026, and worth writing down why.
Discontinued
Swiss EV cost comparison
Compare electric vehicles by CHF/km across five acquisition paths: buy new, buy used, German import, subscribe, or lease.
Live beta
Devlog
Exit code 0 is not evidence
Our price comparison had five products in its database while the scrapers exited 0 every night, and its checkout had never once taken a payment. Both failures had the same shape.
Swiss EV cost comparison: a tool to compare what matters
A beta tool to rank electric vehicles by CHF/km across new, used, imported, leased, and subscription paths, with every figure labelled as either a published rate or our own estimate.
Hello from zzd Labs: building three apps in public, break-even and all
Why a one-person Swiss web studio is publishing its side products in the open — code, numbers, and mistakes included.
The Fairphone 5 has a hidden dual-camera mode. A 200-line probe found it.
Android said the Fairphone 5 can't run both cameras at once. A tiny diagnostic APK said otherwise — and that answer dictated DualShot's whole architecture.
Why Selfvie stopped shearing faces: similarity beats affine
Aligning faces across photos with a 3-point affine transform distorts them the moment the head turns. The fix is a transform that cannot shear by construction.