Apps
Learning a language and finding time together. One at a time, built to be used for years. Status is stated plainly.

KotoSense
Japanese grammar for Korean speakers. Understand the difference between patterns that translate alike, in context. No account, no server, no ads.

WhenWeave
A private calendar and a finder for the free time two people share. Show others only "busy", propose a time, and one tap puts a single event on both calendars.

HangulSense
Korean grammar for Japanese speakers. The sister app of KotoSense, it tells apart Korean expressions that become identical in Japanese. Working title.