J-Roll Android

J-Roll

Jiu-jitsu training with timer, fight bell, and gym management.

Overview

Features & Capabilities

J-Roll is the ultimate app for Jiu-Jitsu instructors to create, organize, and execute their training sessions with complete time control, from warm-up to sparring.

No more stopwatches on your phone, spreadsheets, and scattered notes. With J-Roll, you prepare the day's training and conduct the entire class in an automated sequence, with a sparring bell, visual countdown, and control of each phase.

COMPLETE WORKOUTS, FROM WARM-UP TO FIGHT
- Create workouts divided into phases: warm-up, specific exercises, and fight
- Define exercises with repetitions and estimated time
- Configure fight time and pauses between exercises
- Add general and phase-specific notes

PROFESSIONAL TIMER WITH FIGHT BELL
- Automatic bell at the beginning and end of each exercise and fight
- Visual countdown with progress ring
- Audible alert in the final seconds
- Pause and resume at any time
- Automatic execution of the entire workout sequence

MANAGE YOUR GYM
- Register multiple gyms, each with its own visual identity
- Organize your workouts by day and theme
- Personalized screen with your gym's color and logo

STUDENT CONTROL
- Register students with complete registration forms
- Track class attendance
- Record the progression of belts and grades for each student

MADE FOR TEACHERS

O J-Roll was created by instructors. Every detail was designed so you can focus on what matters: teaching. The app manages the time, bells, and organization. You're in control of the mat.

Download now and take your Jiu-Jitsu training to the next level.

User Growth & Download Statistics

App
By:
Cracker Juice
Downloads:
-
Version:
0 Last updated: 2026-07-17
Publisher country:
US US
Email:
le*****@gmail.com
URLs:
Website ,Privacy policy
Full description:
See detailed description
Source:
Google Play Store
Data ingested on:
2026-07-29
Compare stats and ranking:

Contact the developer

Chrome-Stats does not own this Android app. Please use these information below to contact the Android app developer.
Developed by:
Cracker Juice
Google Play Store
https://play.google.com/store/apps/details?id=com.jrolltraining.app
Email:
le*****@gmail.com
Website:
http://www.leandrotercette.com

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