Rattlegram vs Roll Mate

COFDMTV is based on COFDM (coded orthogonal frequency-division multiplexing) technology: - 160 ms long OFDM symbols - 6.25 Hz per sub-carrier - 1/8 guard interval - differentially encoded PSK (phase-shift keying) modulation - systematic polar codes for forward error correction Currently Modes 14, 15 and 16 are supported: Using either SPC(2048, 1392), SPC(2048, 1056) or SPC(2048, 712) with CRC32C aided SCL decoding and differential QPSK modulation for the payload. Only a bandwidth of 1600 Hz is needed and the transmission of either 85, 128 or 170 bytes take about one second with the leading noise and fancy header disabled.

Rollmate is the all-in-one app for Brazilian Jiu-Jitsu practitioners. Whether you're a white belt just starting out or a black belt competitor, Rollmate helps you track your training, connect with training partners, and stay plugged into the BJJ community. TRACK YOUR TRAINING Log every session with details like duration, techniques drilled, and sparring rounds. Track your training streaks and see your progress over time. Never lose track of mat time again. ACHIEVEMENTS & BELT VERIFICATION Document your competition results, belt promotions, and milestones. Request belt verification from your coaches and build a verified training history that follows you wherever you train. FIND TRAINING PARTNERS Discover other practitioners nearby using the built-in gym locator. Send roll requests to connect with new training partners at your level. SOCIAL FEED Share training highlights, post photos and videos from the mat, and stay up to date with the latest BJJ news. Like, comment, and engage with the community. EVENTS Create and discover BJJ events — seminars, tournaments, open mats, and meetups. RSVP and see who else is going. MESSAGING Chat directly with your training partners. Share photos and coordinate your next session. Whether you train gi, no-gi, or both — Rollmate is built by grapplers, for grapplers.