SIMS was created out of deep love and respect for martial arts. It was developed by athletes of Brazilian Jiu-Jitsu who understand firsthand the real needs of a school and wanted to offer a modern, reliable and completely free management tool to support instructors and students.

What We Offer

SIMS provides a complete set of tools that simplify the daily operation of any martial arts gym:

• Management of members, classes, and payments.
• Online subscription purchases with zero fees or commissions.
• Digital attendance tracking for easy monitoring of training sessions.
• Statistics and insights to help understand progress and gym performance.
• Community features for each gym, allowing members to interact.
• Announcements, messaging, and push notifications for direct communication with students and parents.

Available Everywhere

SIMS works fully on the web, and is also available as an app on the Google Play Store. An Apple Store version is coming soon.

Completely Free — No Hidden Costs

SIMS is offered entirely for free as a contribution to the martial arts community. There are no charges at any level — no subscriptions, no commissions, no hidden fees for online payments. We are athletes who love martial arts and want to support everyone who shares the same passion.

Our Commitment

Our goal is for SIMS to grow alongside the community. We listen to the needs of schools, improve features continuously, and remain true to the values of martial arts — respect, consistency, progress, and contribution.