I been using this app since Samsung S8 days and until now i’m still using it, because it’s kinda cool and easy to use. Snail Camera is the best app right now for doing long exposure in android, but of course a lot of new android phone right now have build in water silky features like in huawei phones and etc, but if your phone doesn’t have that kind of options, well your are in the right place.
Below are the example shots.
Tutorial on how to use the app
DOWNLOAD THE APK