Every smartphone has their built-in flashlights. However, there's a chance that they are not as bright as you want them to be and there's no way of increasing their luminosity.

Fortunately there's an app that can provide a solution to your dilemma. With this application, you can have a powerful LED flashlight on your android phone. 

Since it uses LED light, it won't hurt your eyes that much and won't drain your device's battery even after long usage.

This application is great if you're camping or even when strolling during night time.

It is very easy to use and you can download it for free.