Nightshift for iPhone 5C? Third party app recommendation?

Ok so as you may know, iOS 9.3 came with the new nightshift feature which makes your screen more yellow allowing for better sleep. However, this feature is not included for iPhone 5C and down (5, 4S). Is there a third party app from the internet that allows the same effects? No jailbreaking required please. Link if possible. I do have a Mac if needed.

Notch filter > speakers hurt my ears?

I replaced my front mid speakers with a set of Silver Flute 6.5"s from Madisound & I replaced my front tweeters with a set of Dayton Silkies in my car. I'm powering them with an Alpine MRV F540, which has built in crossovers. Okay, this one guy, Zaph, measures a lot of speakers & he says to keep the mids under 1.8hz so I low passed them @ 1.8khz on my amp & I also high passed them at 55hz to keep them from playing low-er notes. Oh and my amps built in filters are all 12db/octave. I high passed my tweeters at 2.5khz. They are large format & will do 2khz 2nd order believe it or not. I left that gap so I don't end up with a bump where the mid and tweeter meet.

Anyways, I only have it at like 80-90db SPL levels (we can talk over this) and certain frequencies in the vocal range hurt my ears. Like higher noted piano keys hurt.

Looking at the response graph of either speaker, I don't see any huge spikes or anything.

How can I tackle this? What's the cheapest way to measure the freq response (like microphone and software or can I just use iphone with app?) & how do i go about the notch filter?

I studY circuits

I don't understand -a single series inductor will low pass a load, say at uh, 100hz & then it will be 6db quieter per octave below that, so at 50 it'll be minus 6db, at 25 itll be -12, etc. Same with capacitor cept other way. Now what about a notch filter? Does it go minus 6 db in both directions? Let's say I have a hump at 500hz. How do I attenuate in both directions?

How to back up my locked iPhone?

Basically I broke my iPhone screen pretty bad today and although I'm taking it for repair I'm worried that its more than just the screen that's broken. The bottom half of the screen is just red and black lines and the top half is normal but the touch function doesn't work at all. I have a load of photos on there that I really don't want to lose and I can't put them onto my computer because I need to enter the passcode on my phone which I can't do. Is there any way to get around this or if there removable storage in the iPhone which I could take out and put the info onto my computer if my phone is completely broken?