Talk2Camera
Editing

Trim on a zoomable timeline

Pinch to zoom. At full magnification one pixel is milliseconds, so an in-point lands on the frame you meant.

iOSAvailableAndroidAvailable
The Timeline tab of the editor: a video preview above the take’s waveform, a selected range on a timeline strip, and an audio section with the original audio switch and an Attach audio track button.
Trimming works against the waveform, so you can cut on a pause rather than guessing from the picture.