LapsOMat helps you to plan and monitor timelapse shoots with a still photo camera.
By moving the sliders for number of exposures and shot interval, LapsOMat will interactively calculate the total duration of timelapse recording. (Define FPS in application preferences.)
Finally, by starting the timer at the beginning of the recording you can keep an eye on the progress of the timelapse.
Note that this App does NOT actually take pictures, NOR control your camera. It is intended for planning and monitoring purposes only.