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.

Available on the US App Store

ZiZBJJ

Your jiu-jitsu is yours to put together.

ZiZBJJ is a personal home for your jiu-jitsu on iPhone and iPad. Browse a few cards, leave a quick note, or connect the moves you learn into a game of your own. Your collection lives locally on your device, ready for a quick revisit or a deeper look. As deep as you like.

  • Personal technique cards for a quick note or a deeper look
  • Connections that help you put your own game together
  • Local-first: your collection is stored on your device
Explore ZiZBJJ
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