Plate 001 · The Dex
JiuJiu is a jiu-jitsu training log built like a catalogue. 232 techniques ship with the app. Each one you learn becomes a plate, stamped with the date, and climbs from white belt to black on the mat time you put into it.
You learn a move on a Tuesday, drill it twice, and a month later you cannot name it. Nothing in the sport keeps a list of what you have picked up, so nothing accumulates anywhere you can look at it.
Logged mat time makes a technique eligible. A tap promotes it. One log is roughly 20 to 40 physical reps, which is why level V is three or four years of a move you genuinely own.
A level you claim during onboarding credits that threshold as a baseline, so a purple belt who rates a move IV reaches V after 45 more logs rather than 75 from scratch.
Plate 002 · Logging
The sheet remembers what you have been drilling lately, so the common case is open, tap the chips, save. Date, minutes, rounds, intensity and a note are all there if you want them. None of it blocks the save.
Plate 003 · Technique
The rank you hold, the ladder underneath it, how many times you have logged the move, when you first learned it, and how many more logs open the next rung. The note is yours and it outlives every session it was written in.
Plate 004 · Home
Five axes drawn off your confirmed levels, not off how often you showed up. A guard player looks like a guard player. There is no leaderboard to join and nobody else is on the chart.
Mat time makes a technique eligible. You tap to confirm it. The app offers, and it never fires on its own, because reps are not the same thing as proficiency.
Belt is recorded, never predicted. There is no countdown, no percentage toward black, no estimate of when your coach will call your name.
No account, no server, no sync, no analytics, no ad network. There is no privacy switch to hunt for, because nothing in the app was built to send.
Every change is written to a journal on disk and flushed before it is committed. Kill the app mid-entry and the next launch puts it back.
It is a version 1.0 build being tested on a handful of phones. Write to me and I will send you a TestFlight seat when the next round opens.
