Speed Overlay Video App for Android
VelocityCam records the video and the GPS speed data at the same moment, so the number shown on screen belongs to that frame. When you export, the overlay is rendered into the new file — no separate editing pass, no guessing at timing. VelocityCam is not currently a general-purpose editor for importing arbitrary external videos; the telemetry has to be captured by VelocityCam while the video is recorded.
How the speed overlay is produced
GPS/GNSS-estimated speed comes from the phone's GPS or a supported external GNSS receiver and is sampled alongside the video timeline. The overlay uses that recorded data rather than guessed post-recording annotations, and the original recording file is never rewritten.
- GPS-derived speed in MPH or KM/H
- Speed samples aligned to the video timeline as it records
- Live overlay on screen while recording
- Same overlay reproduced during Library playback
- Overlay composited into exported files
When a speed overlay is the point
Scenic drives, acceleration clips, boat runs, trail rides, and track days all read better with a speed readout that viewers can trust. Because the value is captured live, the clip is self-documenting rather than annotated later.
Recording a speed overlay clip
- 1
Record once GPS is ready
GPS readiness is required before recording begins, so the first frame already carries GPS speed.
- 2
Record with the HUD you want
Pick a HUD profile before you start. The profile you choose is what appears on screen and, later, in the export.
- 3
Export with the overlay baked in
Choose Original, 9:16 Vertical, 1:1 Square, or 16:9 Landscape. The overlay is rendered into the new file and the source recording stays as it was.
Free
- GPS speed telemetry captured with the video
- Minimal HUD — clean and speed-focused; phone GPS or supported external GNSS
- Synchronized playback
- Exports in all four aspect ratios with the HUD baked in
- Android share sheet for the usual social apps
Pro — one-time lifetime unlock
- Telemetry, Performance, and Boat Racing HUDs (no mount required) and premium HUD themes (Classic, Adventure Amber, Marine Blue, Minimal White, Cyber Green)
- Performance Analytics: GPS/GNSS-estimated speed tests, distance tests, and run comparison
- Watermark control (standard, custom text, or none)
- Offline Route Trace overlay in playback and exports
- CSV, GPX, and KML telemetry export
Your recordings stay on the phone
There is no account, no cloud upload of recordings, and no ads in the Android app. Technical usage analytics and crash diagnostics are described in the Privacy Policy. Recordings and telemetry stay on the device. Exporting saves a file to the phone; it leaves the device only if you then share or upload it.
Device requirements
- Android 10 or newer
- Compatible rear camera (front-camera switching before recording, where supported)
- GPS hardware
- Free storage for recording and export
Frequently asked questions
Can I add a speed overlay to a video I already recorded elsewhere?
No. VelocityCam records telemetry together with the video, so it cannot add accurate speed to footage captured by another camera or app.
Does the overlay change my original file?
No. Exporting creates a new file with the overlay composited in.
Is the speed accurate enough to prove anything?
It is consumer phone GPS. It is good enough for reviewing and sharing a session, but it is not a certified measurement and should not be treated as legal proof.
Can I get a speed overlay without mounting my phone?
Yes. No VelocityCam HUD requires a fixed mount. A passenger, or anyone recording on foot, can hold the phone with Minimal or any Pro HUD.
Install VelocityCam and start recording
VelocityCam runs on Android 10 or newer phones with the required camera and GPS hardware; camera features vary by device. Record a session, review it with synchronized telemetry, then export and share it.
Using an iPhone? VelocityCam for iPhone is coming soon.
Learn about VelocityCam for iPhone →Related VelocityCam pages
The Pro Performance HUD for live GPS performance testing.
GPS/GNSS-estimated speed tests, distance tests, and run comparison.
The real workflow, start to finish.
The full picture of what VelocityCam records.