Privacy
Why I'm building an encrypted period tracker
Period tracking data can tell you when someone got pregnant, whether they're using contraception, if they missed a period, and roughly when they're fertile. In the wrong hands, that information is a weapon.
Security
I published Tarn's threat model. Here's why you should read it.
Most apps don't publish threat models. They publish privacy policies — documents written by lawyers, for lawyers, that describe what a company is allowed to do with your data.
Dev
Every design decision is a trade-off. Here are mine.
Building a privacy-focused app means saying no to things that make apps easier to build, easier to use, and easier to monetize. Every decision I made for Tarn has a cost.
OSS
Building a security app in public
There's a contradiction at the heart of this project. I'm building an app whose entire value proposition is secrecy, and I'm doing it in public.