Products

Three situations, one method

We don't ship feature checklists. Each product serves one specific situation, but all of them go through the same strict editing.

iPhone app in development

ZiZBJJ

Keep what you learn, from this class to the next

ZiZBJJ is being developed as a paid iPhone app for personal BJJ notes: a detail from class, a question for your coach, and something to revisit before your next session. While the app is in development, try the free training note template in a notebook or notes app you already use.

  • Personal BJJ notes, from this class to the next
  • Free training note template — no sign-up required
  • Share your experience with the developer by email
Explore ZiZBJJ in English
WeChat Mini Program · private beta

Echo

A few minutes a day, to hold onto the small good moments

Echo isn't an early-education tool or a development tracker — most parent-child products assume you have a big block of time; Echo assumes you have a few minutes. The core loop is something you can finish every single day: a 30-second setup (just a nickname and birth month — your child never has to be on screen), then "Today", which matches your current mood and energy to one zero-prep game that takes 5 to 8 minutes, then one tap to log what you noticed, done in 5 seconds. After three logged sessions, "Growth" turns that real data into a growth story — nothing invented, and never compared to any other kid, only to your own child's past.

  • "My Childhood": reflect on your own upbringing in exchange for parenting suggestions tailored to how you actually parent
  • Reflections and photos stay on-device by default — nothing goes to the cloud unless it has to
  • A concentric-ripple visual motif, echoing how small moments of care spread outward over time
Visit echo.zizai.tech
For businesses

Lake2Ocean

Enterprise collaboration

An enterprise collaboration product, run independently at lake2ocean.top — head there for the full picture.

Visit lake2ocean.top