Regardless of your symptoms, I would recommend everyone to use Twilight. Your body will thank you for it!
Difficulty sleeping, and eyestrain, due to use of technology.
This app adjusts the colours on your screen to reduce the amount of blue light, and is synchronised with the rising and setting of the sun. You have full control over how orange your screen looks, and how bright (you can actually make it dimmer than you can using just the phone's settings). Simple to use, and it comes with a widget.
Less strain on the eyes, helping your mind and body to relax at the end of the day. The blue light from technology are known to disrupt sleep hormone cycles. Note that this app will only really work if you also keep the lights in your home dim, and don't watch TV, from at least an hour before bed.
Free, Android only.