Tools that work for people who love music and quiet.
Small, well-made instruments for the background of your day.
Kotteri101 Studio designs single-purpose iOS apps — a desk clock, a tone reference, a hearing check — each sold once, with no ads and no accounts. You set one up, and mostly forget it's there.
Applications
An ambient desk clock where tiny construction vehicles work in a bed of falling sand — bulldozer, dump truck, helicopter, tornado — slowly burying the time. Unlock once, and touch the sand yourself.
View unitA tone and pitch reference built for musicians and audio engineers — the precision you want in a critical listening or tuning session, not a toy.
View unitA quick self-check hearing test built with musicians and audio engineers in mind — people whose ears are their instrument. Not a clinical diagnosis, just an honest read.
View unitApproach
Built solo, in Swift and SwiftUI, with the kind of care that goes into something meant to run quietly in the background for years.
Every unit ships free with an honest limit, and unlocks once for a fair price. No subscriptions, no ad networks, no accounts to create.
Contact
Questions, feedback, or a bug to report — reach the studio directly.
