TL;DR. These are two different machines. Delay Camera shows you a live feed running 1 to 300 seconds behind, so you finish a rep, turn around, and watch it play by itself. ReplayR keeps a rolling buffer and writes a clip when you tap, press your watch, or hold up a palm, and since August 2026 Pro also runs a delayed preview at 5, 10, 15 or 30 seconds, so the fixed drill station is covered too. Delay Camera still goes further on lag, to 300 seconds, and captures stills. Everywhere the session should end with footage, the buffer wins, because you finish holding the moments worth keeping. For coaching a session, ReplayR is the one to install.
| Feature | ReplayR | Delay Camera |
|---|---|---|
| Model | Rolling buffer saved on trigger, plus a delayed live feed on Pro | Delayed live feed, plays automatically |
| Lookback range | Buffer 45 s or 90 s free, 3/6/12 min Pro; delayed preview 5/10/15/30 s (Pro) | 1–300 s delay |
| Needs a trigger | To keep a clip, yes; the delayed preview needs none | No, the feed just runs behind |
| Save from a smartwatch | Yes, Wear OS app, Tile and Complication | No |
| Hand-gesture save | Yes, open palm (Pro) | No |
| Slow motion | Playback down to 0.1× (Pro), frame-by-frame stepping | 1/2× and 1/10× |
| Still capture | No | Yes |
| Saved output | MP4, trimmed, after a keep/toss pass | MP4 export from the delayed feed |
| Screen must be visible | No, stealth mode blacks it out | Yes, the screen is the product |
| Pricing | Free + one-time Pro unlock | Free, with in-app purchase |
| Platforms | Android + Wear OS (iOS in progress) | Android |
Delay Camera figures from its Google Play listing (package com.kohshin.delaycamera, developer onsight, version 2.51, updated 22 July 2026, 50,000+ installs, 4 GB RAM recommended). Last verified 2026-07-28.
A delayed mirror is a loop with a lag. Point the phone at the bay, set 8 seconds, hit a golf ball, turn around, and the swing plays on screen without anyone touching anything. Nobody presses a button, nobody misses a rep, and the feedback arrives inside the window where the athlete still remembers the feel.
A rolling buffer keeps the last N seconds in memory and discards the rest. Nothing plays until you say so, and only the moments you save reach the disk. That fits a match, a sparring round, or a two-hour practice where 95 percent of the footage is worth nothing.
The failure modes are opposite. A delayed mirror needs the athlete to turn and look, and it needs a screen they can see, which rules out bright sun and any distance past a few metres. A buffer needs someone to trigger it, which is exactly why ReplayR puts the trigger on a watch and on a palm gesture. Running ReplayR Pro with the delayed preview on covers both failure modes on one device: if nobody looks up, the clip is still there to save.
Delay Camera is a good drill-station app. It is free, it has been maintained (version 2.51 shipped in July 2026), the delay range of 1 to 300 seconds covers everything from a golf swing to a full gymnastics routine, and 1/10× slow motion is slower than what ReplayR offers on playback. If your setup is a phone on a stand two metres from a lifter, that is a solid choice.
ReplayR is a session app. The buffer runs while you coach, saves happen from the touchline or the mat edge, and the swipe pass at the end leaves you with a folder of keepers rather than a delayed feed you never captured. Stealth mode blacks the screen out so the phone can buffer for two hours without cooking its battery.
They cost nothing to combine, and on one phone ReplayR Pro combines them for you: the delayed preview handles the immediate feel, the buffer underneath handles the record. A second device still earns its place when you want a lag longer than 30 seconds at the station, which is where Delay Camera's 300-second ceiling matters.
If you only want one, the question is simple: does the athlete turn around and look at a screen, or do you want a folder of clips at the end? The first is a mirror, the second is a buffer.
A delayed feed alone leaves you with nothing when the session ends. ReplayR gives you the feed and the clips: watch yourself on a 5–30 second lag, then tap, press the watch, or hold up a palm, and the last seconds are saved as an MP4 you can slow down and send. Free to start, one-time Pro unlock.
A delay camera shows a live feed running a set number of seconds behind, so a rep plays back automatically once you turn around. A rolling buffer keeps the last N seconds in memory and only writes a file when you trigger a save. Delay is for self-correction at a station; a buffer is for keeping the moments worth keeping across a whole session. ReplayR Pro now runs both at once: the delayed preview on screen, the buffer recording behind it, and a save still capturing the live footage rather than the delayed picture.
Yes, with an in-app purchase. It is on version 2.51 as of 22 July 2026, has 50,000+ installs, and the developer recommends at least 4 GB of RAM. ReplayR is free with a one-time Pro unlock.
Yes, on Pro, since August 2026. Delayed preview puts the camera screen on a fixed 5, 10, 15 or 30-second lag while the rolling buffer keeps recording underneath, so an athlete can turn around after every rep and watch it play with nobody touching the phone. Delay Camera still reaches further, up to 300 seconds, and adds still capture; ReplayR tops out at 30 seconds and gives you the buffer, the watch trigger and the saved clips at the same time.
For a squat rack with the phone two metres away, a delayed mirror is hard to beat, and ReplayR Pro can be that mirror at a 30-second lag while still saving the working sets. Delay Camera remains the pick when you want a lag beyond 30 seconds or a still capture off the feed.
One-time Pro unlock if you want longer buffers, hand-gesture save, and 8K capture. No subscription.
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