Brazilian jiu-jitsu · Android & iOS

Rook

A training notebook with a coach you can talk to.

Plan the week, log what you trained, and talk it through out loud — hands free, on the mat or in the car. Every record stays on your phone.

Soon on theApp Store Soon onGoogle Play Closed beta

No account, no tracking, no ads. Your records never leave the phone — here is exactly what does.

Rook, the app's coach character, standing in a white gi and black belt, breathing
01The week, and the coach

Five steps, and something to say at each one.

The week in the order you actually do it. Under every step is a request the beta already answers out loud — hands free, on the mat or in the car.

An athlete tying a black belt before training
01 Block
How did my week go?

Reads your attendance, the debriefs you finished, and the positions that keep coming up.

A packed training bag on a bench
02 Week
What have I got on this week?

Reads the next seven days off your own calendar — gi, no-gi, strength, recovery.

An athlete standing ready on the mat
03 Tonight
What did I say I'd work on?

Reads the next focus you wrote in your last debrief, pinned to tonight's session.

Two athletes rolling in a guard passing exchange
04 Mat-side
Mark last night as attended.

Puts a card on screen. Nothing is saved until you tap it.

An athlete writing in a training notebook after class
05 Debrief
Let's debrief tonight's session.

Asks one question at a time, then drafts the journal entry for you to edit.

It proposes. You confirm. The coach can suggest four changes — attendance, a reschedule, a debrief draft, a body record — and each one arrives as a card you tap. Move Thursday's class to Friday lands against the real session with its history intact, and it is not allowed to say moved, logged or saved before you say so.

It will not invent your progress. Nine read-only tools, all pointed at records you wrote. If something is not there, it says so instead of filling the gap.

No injury diagnosis, no weight-cutting, no supplement dosing. Voice is off until you switch it on, and off again the moment you want.

02Screens

The whole app, on both phones.

Unretouched captures from the beta build. One shared core drives Android and iOS, so the two stay in step.

Rook on iPhone, scrolling through Today, the training calendar, mat-side rounds, the game map and a training block
iPhone · dark
Rook on Android, scrolling through Today, Train, Journal, Fuel and Settings
Android · light
03Map & calendar

The map of your game, and the calendar it happens on.

One thing we are building toward, and one the beta already does.

Grapple mapExploring

Every position in 3D, and what leads out of it.

Half guard, the position the athlete trained, with three routes leading out of it — a kimura, an arm triangle and a sweep to mount. Each is a pair of grappling figures drawn from the GrappleMap database. Half guard YOU TRAINED THIS KIMURA ARM TRIANGLE SWEEP TO MOUNT

Real GrappleMap positions · public domain

See RookFlow, the map as its own app →

GrappleMap is a public-domain database of the sport: some six hundred grappling positions and fifteen hundred transitions between them, every one a posable pair of figures.

Point it at the game map you already keep and the map stops being a list — mark what you trained, and see the routes out of it you have not.

Competitions

Find your next tournament without leaving the app.

Search name, city or country
September 2026
City Open · Gi & No-GiStuttgart · Germany
In 6 days
Autumn No-Gi ChampionshipMünchen · Germany
Sep 26
Winter TrialsZürich · Switzerland
Oct 04
Show all tournaments →1,600+ listed

Illustration · Smoothcomp's own calendar

Smoothcomp runs most of the calendar in this sport and publishes it as machine-readable data. Rook reads it when you ask — sixteen hundred events, filtered to the ones you could still enter.

Pick one and it becomes a planned competition, date and place already filled in. One anonymous read, and nothing about you in it.

04What's next

Where the coach is going.

Not in the beta. Written down here because it is what the app is being built toward, and because a training partner you can only talk to after class is half a training partner.