How to use third-party app to click long exposure photos on iPhone?

If you don’t know How To Take Long Exposure Photos On Iphone using a third-party app then follow these steps:-
1. Firstly, unlock your iPhone and go to the App Store.
2. Then log into the App Store and download Slow Shutter Cam.
3. Now launch the Slow Shutter Fast Cam and tap on the Camera Icon.
4. Then turn on the toggle for Screen Shutter and tweak preferences according to the environment.
5. Stay ready and click the picture.
6. Finally access the picture from the Photos app and adjust brightness, contrast, and color.