Catch the exchange, skip the staring
90% of a sparring round is footwork and feinting. The 5 seconds that matter — the entry, the takedown, the tap — are what the 45 s buffer keeps. Saved when you tap, not when you remember to hit record.
Use case · Updated
ReplayR for martial arts instructors
TL;DR. A jab-cross-hook combination is 1.5 seconds. A judo throw entry is 1. A BJJ submission setup is 5–10. The 45-second rolling buffer keeps the whole exchange in memory. Mount the phone mat-side, tap your watch the moment something interesting happens, and the rep is saved before the corner clock resets. No cloud, no fighter footage leaving the gym, no parent-class consent forms for cloud uploads.
Why combat-sport coaches pick ReplayR
Round mode for full bouts
Switch to 90 s (single combo) or Pro 3 min (full round / 5 min BJJ roll). Save once at the bell, full round on the phone.
Watch with both fighters between rounds
Walk the phone to the corner. Show both partners the same 10 seconds. Cue one defensive adjustment. Bell. Go again. Closed feedback loop.
No cloud — sensitive footage stays mat-side
Sparring footage of professional fighters, juniors, or amateurs has obvious privacy stakes. ReplayR is on-device only. Coach decides who sees the clip and when it's deleted.
Discipline-specific setup
BJJ / Grappling
- Mount: tripod at mat edge, lens at standing-eye height for guard play, low angle for stand-up.
- Buffer: 45 s for submissions · Pro 3 min for full 5 min rolls.
- Resolution: 1080p — useful for grip details and frame angles.
- Save: tap on the tap, or as the position resets.
Boxing / Kickboxing
- Mount: ring corner, lens at chest height, slight elevation if possible.
- Buffer: 45 s for combos · Pro 3 min for full rounds.
- Resolution: 1080p — needed for hand-position review.
- Save: tap watch on the bell.
Muay Thai / MMA
- Mount: cage corner or ring side, landscape, capture both fighters.
- Buffer: 90 s or Pro 3 min for full rounds with clinch / ground transitions.
- Resolution: 1080p.
- Save: tap on a meaningful exchange (clinch knee, takedown, scramble), then again at bell.
Judo
- Mount: tatami edge, lens at hip height, far enough to fit the full grip-exchange distance.
- Buffer: 45 s — entries and throws are sub-2 s.
- Resolution: 1080p for kuzushi (off-balancing) details.
- Save: tap on the throw or ne-waza transition.
When to save, when to skip
Save
- Successful submissions / KO setups
- Failed attempts you want to dissect
- Clean technique reps during drill
- Scrambles and transitions
- Defensive saves under pressure
Skip
- Warm-up shadowboxing
- Pure cardio rounds with no exchange
- Static drilling reps after the first 2–3
- Anything you wouldn't watch back tonight
FAQ
What buffer length works for sparring rounds?
45 s for technique and short exchanges. 90 s for 1 min rounds. Pro 3 min for full 3 min rounds (MMA, boxing) or 5 min BJJ rolls.
Can I review a submission right after it happens?
Yes. Tap your watch on the tap or escape. The entry, transition, and finish are all in the saved 45 s clip.
Is audio recorded?
On by default — useful for corner cues, taps, and bell timing. Disable for music-heavy gyms or sharing without trash-talk soundtrack.
What about fighter privacy?
On-device only. Nothing uploads. Coach owns the device and the deletion policy. Important for amateur fighters, juniors, and pre-fight game-plan secrecy.
