Light trail time exposure firefly photos on iPhone

Wondering how to take time exposure light trail photos of fireflies on an iPhone? Try the app Slow Shutter Cam () in light trail mode, sensitivity all the way up, and use Apple headphones with (+) volume button as a remove shutter. I used a tripod with Glif adapter for these, but you can also use a makeshift binder clip tripod adapter as long as you don't have a lot of wind.

Several minute exposure in twilight

I noticed most of the fireflies fly UP as they light up, forming little commas

Fireflies and fireworks on the 4th of July

Had the tripod up high to look down on the fireflies. Viewing side-on you lose a lot of depth and viewing up they are lost against the sky.