Independent product studioTXN / 001
Focused software. Real-world utility.
TXN LLC turns narrow, meaningful ideas into useful products—from personalized health tools and hands-on aviation education to books about payments.
Explore the work01 / Selected work
Projects with a purpose.
Public products and books created by TXN LLC.
Hzera
Personalized tinnitus sound therapy built around precise calibration, research-informed listening methods, and private on-device use.
Visit hzera.comTower Drill
ATC radio training that helps student pilots practice clearances, readbacks, and phraseology out loud before the next flight lesson.
Visit towerdrill.comBrashen
Small, specific challenges for practicing real-world courage—designed to help people try the thing, learn from the attempt, and keep the win.
Visit brashen.comUS Payment Handbook Third Edition
A one-hour guide to how money actually moves—from the two-second approval to the middlemen, overnight batch, and fees behind a card payment.
Visit uspaybook.comApproved
The hidden psychology of how we pay—an industry insider’s look at how payments became painless, who benefits, and how to pay on purpose.
Visit payonpurpose.com02 / About
Small by design.
Serious about the details.
TXN LLC is an independent company that builds and publishes its own software products and books.
We work where a focused tool can make a complicated task feel clearer. Each project begins with a specific real-world problem and is shaped into software that is practical, considered, and ready to earn its place.
03 / Contact