Moment's new app update gives you the ability to take long exposure photos with your phone, and export it as video or live photo. And it's very well implemented.
As a practice run, I just took some images of my train trip this morning and another while I was walking across the bridge in Paris. It's not just easy to use, but it does change the way you approach your shot, and it makes me want to try new things, even if it's not related to my style of photography.
You've Got Two Options
You can set it up for motion blur or for light trails, and with each of these, you can change exposure time (4, 8, 15, 30 and Bulb). If you use your phone to take pictures, and let's be honest, we all do, this could give you some more options when you're out without your camera. It might even be that this technology transfers to our DSLR or mirrorless cameras one day too.
If you carry your phone with you, and we all know you do, the Moment app has another feature that is not found in other apps. And what's even more than that, is that it's implemented in a very good way. I'm stoked about them developing new technologies, and that with great lenses to create a compact kit you can take anywhere.
The only advice I have is that you have a sturdy tripod, and that you use your Apple smartwatch to trigger the photo, because any shake will be seen in the end result, and the flat surface of the phone is not the ideal for windy places.
Check out the site for more information.