ReplayR FAQ
TL;DR. ReplayR is a sideline replay camera with a continuous rolling buffer (45 s–12 min). On-device only, no cloud, no account, no tracking. Clips record the camera mic and any saved clip can be muted for good from the Edit screen (Pro). Pro is a one-time unlock for longer buffers, 8K capture, hand-gesture save, clip muting, and bin restore. Wear OS Tile + Complication ship in the free tier.
How does the rolling buffer work?
ReplayR records the camera into 5-second chunks on disk. Chunk count = buffer duration ÷ 5 s, a 90-second buffer holds 18 chunks. As new chunks arrive, the oldest is overwritten. Save concatenates the buffered chunks via FFmpeg with no re-encoding (~200–500 ms).
How much storage does it use?
Buffer holds only the last buffer length on disk. At 480p, a 90 s buffer is ~60–80 MB. At 1080p (Pro), ~200–300 MB. Saved clips at 1080p run ~10 MB per 10 s. Free up 2 GB before long sessions.
Does it drain my battery?
Less than full-session recording. Stealth mode (pitch-black screen) drops display draw for sessions over an hour. Plug in for 90+ min.
Will my phone lock or go to sleep mid-session?
No. ReplayR keeps the screen awake while the camera is recording, so the phone never auto-locks and the buffer never stops halfway through a session. It is on for everyone, free tier included, with nothing to set up. For long sessions, turn on stealth mode as well: the screen goes pitch-black to save battery, but the phone still stays unlocked and recording.
Does ReplayR upload my videos?
No. Strictly on-device. No cloud uploads, no accounts, no tracking. Nothing reaches your gallery until you keep a clip.
Is there a Wear OS companion?
Yes, full remote (start, end, save, pause, set clip duration) plus Tile and Complication for one-tap save from any watch face. Free for both tiers.
What about Apple Watch?
A watchOS companion exists in the codebase but the iOS app is not yet publicly shipped. Android + Wear OS is the supported pairing today.
What capture resolutions are supported?
Free: up to 480p. Pro: 720p, 1080p, 1440p, 4K, 8K (capped to your phone's camera).
What output format are clips?
MP4 (H.264). Concatenation is stream-copy, no re-encoding, saves are fast and lossless against the captured source.
How does open-palm hand-gesture save work?
Pro. A BlazePalm TFLite model runs on live camera frames. Raise an open palm into frame and ReplayR saves. Sensitivity tunable across 5 steps.
Can I save a replay with a Bluetooth remote or the volume buttons?
Yes, on Android, free. Pair any Bluetooth camera shutter remote (the small selfie remotes sold for phone photos) in Android's Bluetooth settings, start the buffer, and press the button. ReplayR saves the replay at the clip length you picked and the phone vibrates to confirm. The phone's own volume buttons do the same while the camera is recording; everywhere else in the app and the OS they change the volume as usual. ReplayR listens for volume up and down, the camera key, Enter, headset hook and media play/pause, so most remotes work without setup. A double press within 1.5 seconds counts once. Turn it off with Remote shutter in Settings. Not available on iOS. Buying and setup tips: save a replay with a Bluetooth remote.
Can I turn off autofocus?
Yes, free. Auto focus in Video Settings has three modes. Full (the default) keeps refocusing, and you can tap the picture to focus on a point. Manual only focuses once on the middle of the picture and holds that focus, so the image no longer goes soft when a player, the ball or a net crosses in front of the lens; tap the picture to lock focus on another spot, and it stays there. After a rotation or when the app comes back from the background, focus returns to the middle. Off locks focus on the middle of the picture and ignores taps. Exposure and white balance stay automatic in every mode.
Do I have to allow the microphone?
No. ReplayR needs the camera, but the microphone is optional. If you say no to it, recording starts anyway and your clips simply have no audio. A small “🔇 No sound” tag in the top bar of the camera screen shows this. Tap the tag to turn sound on; the current buffer restarts so every clip stays in one piece. ReplayR asks for the microphone only after the camera is allowed, one question at a time.
What is the delayed preview?
Pro. The camera preview plays back what the lens saw 5, 10, 15 or 30 seconds ago while the rolling buffer keeps recording underneath, so you can do a rep, look up and watch it without touching the phone. Set the delay from the pill on the camera screen or from Settings; changing it re-anchors the picture without stopping the session. Video only, no sound. Saving is unchanged: a clip captures the last N seconds of live footage, not the delayed picture on screen. See delayed mirror apps explained.
Where does the delayed preview run?
Android only, and only in the seamless recording mode. The delayed player reads finalized ~3-second segments the recorder has already written, which is what makes a 5-second lag reachable. The classic chunk mode writes 45–180 s chunks, so a segment a few seconds old does not exist yet on disk. A 0s entry in the Delay preview setting turns the feature off and removes the pill from the camera screen; that option is not Pro-gated.
Is there a subscription?
No. Pro is a one-time non-consumable in-app purchase (replayr_pro), with an early-supporter tier for the first 1,000 buyers.
What does Pro unlock?
3 / 6 / 12 min buffers, 60 s / 2 min / 5 min / 10 min clip durations, 720p–8K capture, open-palm hand-gesture save, the delayed preview mirror, muting a saved clip's audio, the Analyze frame-by-frame player, drawing on a frame, bin restore.
What languages are supported?
Six: EN, FR, ES, DE, IT, PT-BR. Auto-detects device language.
What happens to clips I toss?
Bin with 24-hour recovery. Pro can restore; on Standard, restore is paywalled, delete still works.
Do I need an account?
No. No sign-in, no email, no profile. Pro entitlement tied to your Google Play account.
Can I trim or slow-mo clips?
Yes, trim and playback speed in the in-app editor, free. On the Edit Clip screen the start, end and current position show to the millisecond (mm:ss.mmm); tap one to type an exact time, or use “Use playhead” to set the start or end at the current video position. Pro adds the Analyze player: frame-by-frame stepping in both directions, playback down to 0.1×, a live frame counter, volume-key stepping, and saving or sharing any single frame at the clip’s full recording quality. Pro also lets you draw on a frame, freehand, straight lines and short labels, exported as one flattened image. For telestration on a moving clip, side-by-side comparison or voice-over, export the MP4 to a dedicated analysis app.
Does the saved replay clip record sound, and can I mute it?
Yes to both. The rolling buffer records the phone’s camera microphone, so a clip you keep carries whatever was audible when the moment happened, and the saved MP4 has a real audio track. To take it out, open the clip, tap Edit, and switch the Audio row to muted (Pro). The preview goes silent the instant you tap it, and the audio track is stripped from the file when you confirm, so the exported MP4 carries no sound at all rather than sound at zero volume. Because the choice happens after the clip is saved, you never have to decide between recording silently all session and being stuck with the noise afterwards. Muting is permanent for that clip, so duplicate it first if the audio might matter later. If you would rather never capture sound, say no when ReplayR asks for the microphone: recording still starts, clips have no audio, and a “No sound” tag in the top bar tells you so.
Why mute a sideline clip before sharing it?
A sideline clip picks up far more than the play: other people’s children called by name, parents’ commentary, a blunt in-the-moment correction, and whatever is playing over the facility speakers. Under GDPR and similar rules a recorded voice is personal data in the same way a face is, and a bystander who accepted being filmed did not necessarily accept being quoted. Licensed music on the PA can also get a clip muted or blocked once it reaches a public platform. Stripping the audio on the Edit Clip screen removes that whole category of risk before the file leaves your phone. Consent guidance is in recording ethics in sports facilities.
Does it work on iOS?
React Native (Expo SDK 55), iOS is not shipped publicly yet. Android + Wear OS is the live combination.
How do I report a bug?
Settings → Send feedback. Goes straight to the studio.