App 02 · Video · Android + Wear OS

ReplayR

ReplayR is your sideline replay camera. Save only the seconds worth keeping.

ReplayR is a sideline replay camera app for Android and Wear OS that keeps a continuous rolling video buffer on your phone. Mount your phone, let it loop, and save the last 45 seconds (up to 12 minutes on Pro) with a tap, your smartwatch, or an open-palm gesture. At the end of the session, swipe right to keep, left to toss, trim in the built-in editor. On Pro, tap Analyze to step through the clip one frame at a time and draw on the frame that matters.

Get it onGoogle Play iOS · coming soon Wear OS companion Pro · one-time unlock

Continuous rolling buffer, 45 s, 90 s, up to 12 min on Pro
On-device only, no cloud uploads, no accounts
Wear OS companion with Tile and Complication
Open-palm gesture save (Pro)
Swipe-to-keep review and built-in trimmer
Frame-by-frame analyze player, slow-mo to 0.1× (Pro)
Draw on a frame and save or share it (Pro)
Capture up to 8K resolution (Pro)
Stealth mode and screen dim
One-time Pro unlock, no subscription

Short answer. ReplayR is a sideline replay camera for Android and Wear OS. It keeps a continuous rolling video buffer on the phone, so nothing is recorded permanently until you decide it matters. Save the last 45 seconds, or up to 12 minutes on Pro, with a tap, a Wear OS watch, or an open-palm gesture. Nothing is uploaded.

How does ReplayR work?

01
Mount it
Tripod, fence wedge, lean against a wall.
02
Start buffering
The rolling buffer loops over the last 45s–12min.
03
Save the moment
One tap, watch, or open-palm gesture (Pro).
04
Keep or toss
Swipe-to-keep at session end, trim, mute the audio if you are sharing it (Pro), save.

Sideline video analysis, without the cloud

Video analysis has two halves: getting the moment on camera, and breaking it down afterwards. Most sports performance analysis platforms are built for the second half and assume you already have the footage, which is why they hand you a full-session recording to scrub through. ReplayR owns the first half, and since August 2026 it covers the part of the second half that actually settles arguments: frame-by-frame review and drawing on a frame, on-device, with no account.

Capture, in ReplayR

Rolling buffer, one-tap save, swipe-to-keep review, trim. Everything that has to happen while the session is still running.

Frame-level review, in ReplayR (Pro)

The Analyze button opens a fullscreen player: step one frame at a time, hold to run a sequence, scrub with frame precision, slow to 0.1×. Then draw on the frame and save or share it. See how the analyzer works.

Still no platform in between

No account, no upload queue, no per-coach seat. The clip and the annotated still go from the buffer to your storage to whoever you choose to send them to. Side-by-side comparison and voice-over still belong to dedicated analysis apps.

Deciding between the two? ReplayR vs OnForm compares rolling-buffer capture plus on-device frame analysis against a full subscription analysis platform, and best slow motion analysis apps 2026 covers the wider field.

Frame-by-frame review and drawing (Pro)

Some calls hinge on a single frame: a no-ball, a line call, a foot fault, the exact moment of contact. Tap Analyze on any saved clip and ReplayR opens a fullscreen player built for that. Step forward or back one frame at a time, hold a step button to run through a sequence, or drag across the video to scrub with frame-level precision. A live counter shows exactly which frame you are on.

One frame at a time

Single-frame stepping in both directions, hold-to-run for a sequence, and a drag-to-scrub track with frame precision. The frame counter tells you where you are, so you can go back to the same frame twice.

Slow motion down to 0.1×

Playback now goes to a tenth of real speed. The previous floor was 0.25×, which is fine for a bar path and too fast for an impact position.

Save or share any single frame

Keep a still at the clip's full recording quality straight to your photos, or send it to anyone through the usual Android share sheet. Useful for a coaching note, or for settling an argument.

Volume buttons step frames

On the analyze screen the volume keys move one frame at a time, so you can work through a sequence without your fingers covering the picture.

Mark up any frame

Pause on the moment that matters and tap Annotate frame. Draw freehand to trace a swing path or highlight footwork, drop a straight line to check alignment, and add short labels right where they belong. Four colours, three sizes, undo and clear-all while you work.

The drawing is part of the picture

Saving or sharing an annotated frame gives you one image with the markings baked in, at the clip's full recording quality. Nothing to combine afterwards, and it looks the same in any app you send it to. Closing the drawing screen puts you back on the exact same frame, ready for the next one.

Both features are part of the one-time Pro unlock. Full walkthroughs: frame-by-frame video analysis on Android and drawing on a video frame.

Your video stays on your device

Every competing video analysis app is a cloud platform. Footage uploads to someone else's server, sits behind an account, and stays there after you stop paying. ReplayR is on-device only: no account, no upload, no analytics SDK, no clip leaving the phone unless you explicitly send it. That is a structural difference, not a setting you can toggle on the other apps.

Private by construction

Nothing is written to your gallery until you keep it, and nothing is transmitted at all. There is no server-side copy to request, audit, or delete, because one was never made.

Easier when you film minors

Coaching youth athletes means answering to parents and safeguarding officers. "It never leaves my phone" is a materially easier conversation than explaining a third-party cloud. It does not replace your club's media-consent policy, see the ethics guide.

Works with no signal

Pool decks, indoor courts, rural pitches. A training session at the edge of coverage behaves exactly like one on wi-fi, because nothing is ever waiting to sync.

Nothing to lose access to

Coach's Eye was retired and took its cloud libraries with it; the name has since been relaunched by an unrelated company, which does not bring your old clips back. Clips saved from ReplayR are ordinary MP4 files in your own storage, readable by anything, dependent on nobody.

More on the studio-wide position: privacy-first apps at Mobile Squad.

Works across your devices

The phone films. You are rarely standing next to it. ReplayR is built so the save trigger reaches you wherever you actually are during a training session, which is the part cloud analysis platforms leave unsolved.

Android phone

The capture device. Mount it, start the buffer, put the screen to sleep with stealth mode. Capture up to 8K on Pro.

Wear OS watch

Full companion app plus a Tile and a Complication, so saving is one tap from your watch face. Start, end, pause, save, change clip duration, all from the wrist. Connects over Bluetooth, no cell signal needed.

No device at all

Open-palm gesture save (Pro) triggers from in front of the lens, for when you are the one being filmed and your hands are chalked, gloved, or holding a racquet.

iOS is on the roadmap and not yet available. Android and Wear OS are the platforms that work today.

Who is ReplayR built for?

Racquet sports

Tennis rallies, padel volleys, pickleball points.

Board & wheels

Surf takeoffs, ski runs, skate tricks.

Hoops & team sports

Pickup games, practice drills, coaching reviews. One training session, a handful of clips worth keeping. Sideline setups for youth soccer coaches, rugby coaches and hockey coaches.

Kids & pets

First steps, backyard goals, zoomies, the unrepeatable stuff.

Form check

Lifts, swings, technique work. Replay yourself without a coach.

Stealth mode

Pitch-black screen while buffering saves battery for long sessions.

Running an instant replay system for a coaching session works the same in every sport, only the buffer length changes: 90 s to 3 min for a youth soccer attacking phase, 3 min for a rugby passage of play, 90 s for a hockey shift. Every sport guide is listed on the sports page.

Free vs Pro

FREE

Everything you need to get started

45 or 90-second rolling buffer
5–30 second clip lengths
Up to 480p capture
Swipe-to-keep review & trim editor
Full Wear OS companion + Tile + Complication
Stealth mode for battery
Bin with 24-hour recovery window

PRO · ONE-TIME UNLOCK

For serious sessions

3, 6, or 12-minute rolling buffer
Clip lengths up to 10 minutes
720p, 1080p, 1440p, 4K, or 8K capture
Hand-gesture save, open palm, hands-free
Frame-by-frame analyze player with frame counter
Slow motion down to 0.1×, volume keys step frames
Save or share a single frame at full recording quality
Draw on a frame: freehand, straight lines, text labels
Mute a saved clip: strip the audio track before sharing
Restore tossed clips from the bin

What’s inside ReplayR?

ReplayR buffering during a tennis session

ReplayR capturing form-check footage in the gym

A real session with ReplayR

Sofia coaches junior tennis players. She used to record full 90-minute sessions and spend 20 minutes scrubbing for useful clips. Here's what her Tuesday practice session looks like now.

3:30 PM · Setting up courtside

Sofia props her phone against her ball cart with a small tripod wedge, aimed at the baseline. She opens ReplayR, taps Start buffer. The rolling window is set to 90 seconds, enough to cover a full rally exchange. The screen goes dark (stealth mode). The buffer is running.

3:47 PM · A rally worth keeping

One of her players has a backhand that breaks down under pressure. The drill just produced a perfect example, the exact moment the elbow drops. Sofia glances at her Wear OS watch and taps Save. The last 90 seconds are written to local storage. The buffer keeps running. Play continues without interruption.

5:00 PM · End of session review

She saved 8 clips across two hours. ReplayR shows them in the swipe-to-keep queue: swipe right on the good ones, left to discard. She keeps 5, trims two in the built-in editor to show just the stroke, and shares them via Quick Share. No login. No upload queue. Two minutes total.

Zero dead footage on the device

The 90-second buffer never fills her storage. Only the clips she explicitly kept were written to disk. The two hours of practice that produced nothing worth saving? It was never stored. Her phone has the same free space it started with, minus five clips.

What ReplayR doesn't do

ReplayR is a capture tool. It's deliberately not a full analysis platform, understanding the edges helps you decide if it fits your workflow.

No automatic cloud backup

Clips stay on your device until you share or export them. There's no background upload to a cloud library. This is intentional, it means no accounts, no tracking, no clips leaving your device without your say-so.

No side-by-side comparison or voice-over

Pro now covers frame-by-frame stepping and drawing on a frame, but the drawing lives on a still image, not on the moving clip. Comparing two athletes in a split screen, overlaying one clip on another, and recording a voice-over track are still jobs for a dedicated analysis app.

Not a full-session recorder

If you need a complete, uninterrupted recording of an event, every minute, every moment, ReplayR isn't it. The rolling buffer discards footage that wasn't explicitly saved. For archival full-session recording, use your phone's native camera app.

No iOS support yet

ReplayR is Android-first today, with a full Wear OS companion. iOS support is on the roadmap but not yet available. If you and your athletes are split across platforms, Android is the side that works today.

FAQ

How does the rolling buffer work?

ReplayR loops over the last 45 or 90 seconds (3, 6, or 12 minutes on Pro). Older footage is overwritten, only the last buffer length is stored until you tap save.

Does ReplayR upload my videos?

No. Recordings stay strictly on-device. No cloud uploads, no accounts, no tracking. Nothing is written to your gallery until you explicitly keep it.

Is there a Wear OS companion?

Yes. Start, end, save, pause, change clip duration, all from your wrist. Includes a Wear OS Tile and Complication for one-tap save from any watch face.

Is there a subscription?

No. Pro is a one-time unlock, longer buffers, longer clips, capture up to 8K, hand-gesture save, frame-by-frame analysis, drawing on a frame, muting a saved clip, and bin restore.

Does it drain my battery?

Less than full-session recording. Stealth mode keeps the screen pitch-black while buffering to save battery on long sessions.

Can I review a clip frame by frame?

Yes, on Pro. The Analyze button on the review screen opens a fullscreen player built for close inspection: step forward or back one frame at a time, hold a step button to run through a sequence, or drag across the video to scrub with frame-level precision, with a live counter showing which frame you are on. Playback slows to 0.1×, and the volume keys step one frame at a time so your fingers stay off the picture. Any single frame can be saved to your photos or shared, at the clip's full recording quality. Side-by-side comparison and voice-over still belong to dedicated analysis apps such as OnForm. Full walkthrough: frame-by-frame video analysis.

Can I draw on a video frame?

Yes, on Pro. Pause on the frame that matters and tap Annotate frame: freehand for a swing path or footwork, a straight line for alignment, and short text labels where they belong. Four colours, three sizes, undo and clear-all. Saving or sharing gives you one image with the markings baked in at the clip's full recording quality, and you come back to the exact same frame in the analyzer. Full walkthrough: drawing on a video frame.

Does a saved replay clip have sound, and can I mute it?

Yes. The rolling buffer records the phone’s camera microphone, so a saved clip keeps the sound that was around when the moment happened, and you can remove that sound afterwards. Open the clip, tap Edit, and switch the Audio row to muted (Pro). The preview goes silent as soon as you tap it and the audio track is stripped from the file when you confirm, so the shared MP4 has no sound at all rather than sound turned down. Deciding after the clip is saved is the point: sideline audio picks up other people’s children by name, parents’ commentary, coaching you would not want quoted, and music over the facility speakers. Muting is permanent for that clip, so keep a copy first if the sound might matter, and the microphone can be switched off in Settings if you never want audio at all. See recording ethics in sports facilities and the full FAQ.

How do I share videos with my athletes?

Keep the clip at the end of the session, trim it in the built-in editor, then share videos through whatever you already use, Quick Share, your team chat, email, or a messaging app. There is no upload step and no link that expires, because the file is on your phone rather than on a server. The full walkthrough, including slowing a clip down before sending it, is in how to share slo-mo clips with athletes.