Video Mark Timer Mobile

Phone-friendly version with larger buttons and safer local video loading. Load a video, add marks, and measure elapsed time between two marks automatically.

Pick a video from your phone. If an iPhone clip will not load, try a shorter trimmed copy or an MP4 export.

Choose Video Record / Choose Camera Video

00:00.000 00:00.000

Elapsed Between Selected Marks

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Tap a row once to select it Select any 2 rows to measure elapsed time Use frame step for precision

No marks selected.

Marks

#	Label	Time	From Previous	Actions
No marks yet.

Troubleshooting:
1. Open this file in Safari or Chrome, not a file preview pane.
2. If your phone video still will not load, trim it in Photos and save a shorter copy.
3. If needed, convert the clip to MP4/H.264 for best compatibility.