The dashcam that doesn’t blink.
Witness keeps recording when your screen is off, watches the road while it does, and never lets the loop overwrite the minute that mattered.
Everything runs on your phone. No account, no cloud, no subscription.
Built for the drive you didn’t expect
Every feature exists because a dashcam that fails quietly is worse than no dashcam at all.
Loop recording
Continuous segments on the rear camera, and the front too where your phone supports both. Files roll over without dropping a frame — a gap is exactly where the incident is.
Keeps going with the screen off
A foreground service holds the cameras and the CPU awake, so the recording survives the display sleeping — which is most of the battery and most of the heat.
Locks the clip on impact
The accelerometer tracks its own baseline, so a phone at any angle in the cradle still reads a real jolt. A locked clip is never overwritten to make room. Ever.
Stamped into the footage
Time, date, speed and coordinates are drawn into the frames themselves, not overlaid by the player — so an exported clip carries its own context.
Watches the road
On-device alerts for closing distance, tailgating, drifting out of lane, and the speed limit on the sign you just passed. No connection required.
Starts with the car
Pair it with your head unit and Witness begins recording when the engine does, and stops when you walk away. A dashcam you have to remember is a dashcam that was off.
Keep what matters
Save any clip to your gallery and it survives the loop, the app, and uninstalling Witness altogether. Evidence outlives the tool that made it.
The parts most apps get wrong
Three decisions that decide whether footage exists when you need it.
- No gap between files
- Segments hand off through
setNextOutputFile, so the encoder never stops. The common approach — stop, then start — loses about a third of a second at every boundary. - Degrades, never fails
- If your phone refuses a second camera, it records one. If it refuses the analysis stream, the assistance turns itself off and the recording continues untouched. Nothing optional is ever allowed to stop the camera.
- Meters the road, not the sky
- A windscreen frame is half sky, and exposure anchored to it leaves tarmac, markings and number plates too dark to read — exactly when the sun is low.
Questions people ask first
The seven that decide whether a dashcam app is worth installing.
Does Witness keep recording when the screen is off?
Yes. A foreground service holds the cameras and the CPU awake, so recording survives the display sleeping — the normal state of a dashcam on a long drive. Android needs the battery optimisation exemption granted for this, which the app asks for during setup.
Does my footage get uploaded anywhere?
No. Witness has no account, no server and no analytics. Video, audio and location are written to the app's private storage on your device and stay there. There is no mechanism in the app to send them anywhere.
What happens when storage runs out?
Recording loops: once the space you allocated is full, the oldest unlocked clip is overwritten by the newest. Clips locked by an impact, or locked by you, are never overwritten automatically — and if the loop cannot free enough space it tells you rather than quietly discarding evidence.
Can it record the front and rear cameras at the same time?
The rear camera always. The front camera as well on phones whose hardware allows both at once — and where it does not, Witness records the rear rather than failing.
Does the driver assistance need an internet connection?
No. Collision, following distance, lane departure and speed limit sign recognition all run on the phone using models bundled inside the app. Nothing is downloaded and the app works with no connection at all.
Do saved clips survive uninstalling the app?
Clips you explicitly save to your gallery are copied into your device's shared Movies folder and belong to your media library from then on — uninstalling Witness does not remove them. Everything left in the app's own storage is deleted when you uninstall or clear its data.
Is Witness free, and is there a subscription?
There is no account and no subscription. Everything runs on your phone, so there is no server to pay for.
Your footage never leaves your phone
Witness has no account, no server and no analytics. Video, audio and location stay in the app’s own storage on your device, and nothing is uploaded anywhere. The only copies that exist are the ones you choose to save or share yourself.
Read the privacy policy